Document:

<PAGE>   1
                                                                    EXHIBIT 10.3

                               FIRST AMENDMENT TO
                                 SECOND AMENDED
                                  AND RESTATED
                                CREDIT AGREEMENT

                           DATED AS OF APRIL 12, 2001

                                  BY AND AMONG

                             AIMCO PROPERTIES, L.P.,
                       AIMCO/BETHESDA HOLDINGS, INC., AND
                             NHP MANAGEMENT COMPANY
                                  as Borrower,

                             BANK OF AMERICA, N.A.,
                            as Administrative Agent,

                                 DEPFA BANK AG,
                         as Managing Agent and a Lender

                                       and

                        NEW YORK LIFE INSURANCE COMPANY,
                                   as a Lender

                                       1

<PAGE>   2

                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                 This FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT
AGREEMENT (this "Amendment") is dated as of April 12, 2001 (the "AMENDMENT
EFFECTIVE DATE") and entered into by and among AIMCO PROPERTIES, L.P., a
Delaware limited partnership ("AIMCO"), AIMCO/BETHESDA HOLDINGS, INC., a
Delaware corporation ("AIMCO/BETHESDA") and NHP MANAGEMENT COMPANY, a District
of Columbia corporation ("NHP MANAGEMENT") (AIMCO, AIMCO/Bethesda and NHP
Management collectively referred to herein as "BORROWER"), BANK OF AMERICA, N.A.
("BANK OF AMERICA"), as Administrative Agent (in such capacity, "ADMINISTRATIVE
AGENT"), DEPFA BANK AG ("DEPFA"), and NEW YORK LIFE INSURANCE COMPANY ("NEW YORK
LIFE"), and is made with reference to that certain Second Amended and Restated
Credit Agreement (the "CREDIT AGREEMENT") dated as of September 20, 2000 by and
among Borrower, each lender from time to time party thereto, BANK OF AMERICA, as
Administrative Agent, Issuing Lender and a Co-Lead Agent, FLEET NATIONAL BANK,
as a Lender, a Co-Lead Agent, and Syndication Agent, and FIRST UNION NATIONAL
BANK, as a Lender and Documentation Agent (the Credit Agreement as amended by
this Amendment, the "AMENDED Agreement"). Capitalized terms used in this
Amendment shall have the meanings set forth in the Credit Agreement unless
otherwise defined. The Guarantors set forth on pages S-5 through S-16 are only
parties to this Amendment for purposes of Section 4 and are not a party to the
Credit Agreement.

                                     RECITAL

         WHEREAS, Borrower and Administrative Agent desire to amend the Credit
Agreement to increase the Combined Commitments by $50,000,000 to an aggregate
total of $400,000,000 as of the date hereof;

         WHEREAS, each of the Lenders has acknowledged and agreed that its
consent to any increase in the Combined Commitments up to a maximum of
$400,000,000 is not required so long as Administrative Agent and Borrower have
consented in writing to such increase;

         WHEREAS, DePfa, Administrative Agent and Borrower hereby consent to
adding DePfa as a new Lender with a Commitment of $25,000,000 and as an assignee
of Bank of America, as Lender, with respect to $5,000,000 of Bank of America's
Commitment, pursuant to a Notice of Assignment and Acceptance of even date
herewith, such that after giving effect to such Notice of Assignment and
Acceptance and this Amendment, DePfa's total aggregate Commitment shall be
$30,000,000;

         WHEREAS, New York Life, Administrative Agent and Borrower hereby
consent to adding New York Life as a new Lender with a total aggregate
Commitment of $25,000,000;

                                       2

<PAGE>   3

         NOW, THEREFORE, in consideration of the agreements, provisions and
covenants contained herein, the parties agree as follows:

AMENDMENTS TO THE CREDIT AGREEMENT

AMENDMENT TO SUBSECTION 1.01: DEFINED TERMS.

Subsection 1.01 of the Credit Agreement is hereby further amended by deleting,
in their entirety, the definitions of the terms listed below and inserting the
following in lieu thereof:

                  "COMBINED COMMITMENTS" has the meaning assigned to such term
         in the definition of "Commitment". The Combined Commitments are
         $400,000,000.

                  "PRO RATA SHARE" means, with respect to each Lender, the
         percentage of the Combined Commitments set forth opposite the name of
         that Lender on Schedule 2.01, as may be amended from time to time.

AMENDMENT TO SCHEDULES.

Schedule 2.01 shall be deleted in its entirety and replaced with that attached
hereto.

Schedule 5.16 shall be deleted in its entirety and replaced with that attached
hereto.

CONDITIONS TO EFFECTIVENESS

         This Amendment shall become effective on the Amendment Effective Date,
if each of the following conditions are satisfied:

Borrower, DePfa and New York Life have delivered to Lenders (or to
Administrative Agent for Lenders with sufficient originally executed copies,
where appropriate, for each Lender and its counsel) executed copies of this
Amendment dated as of the Amendment Effective Date;

Guarantors have executed this Amendment with respect to Section 4;

Borrower shall have executed a new Committed Loan Note for DePfa and New York
Life, respectively, dated as of the Amendment Effective Date and in an amount
equal to DePfa's and New York Life's Commitment, respectively;

Borrower shall have delivered a certificate, satisfactory to Agent, signed by a
Responsible Officer stating that (i) the representations and warranties
contained in Section 3 are true and correct on and as of the Amendment Effective
Date, and (ii) no Default or Event of Default then exists, and no Default or
Event of Default will result from the consummation of the transactions
contemplated by this Amendment;

If required by Administrative Agent, Lenders and their respective counsel shall
have received originally executed copies of one or more favorable written
opinions of counsel for Borrower and

                                       3

<PAGE>   4

the Guarantors in form and substance reasonably satisfactory to Administrative
Agent and its counsel, dated as of the Amendment Effective Date, with respect to
the validity, binding effect and enforceability of this Amendment, and due
authorization, execution and delivery thereof, and as to such other matters as
Administrative Agent acting on behalf of Lenders may reasonably request; and

Borrower shall have paid the reasonable fees, costs and expenses of
Administrative Agent's counsel in connection with this Amendment.

Each of DePfa and New York Life shall have received the full amount of the fees
set forth on the Schedule of Fees attached to its respective Allocation Letter
dated as of even date herewith.

BORROWER'S REPRESENTATIONS AND WARRANTIES

                  In order to induce Lenders to enter into this Amendment and to
amend the Credit Agreement in the manner provided herein, Borrower represents
and warrants to each Lender that the following statements are true, correct and
complete:

CORPORATE POWER AND AUTHORITY. Borrower has all requisite corporate power and
authority to enter into this Amendment and any other agreements, guaranties or
other operative documents to be delivered pursuant to this Amendment, to carry
out the transactions contemplated by, and perform its obligations under, the
Credit Agreement. Each of the Borrower, the REIT and the Guarantors are in good
standing in the respective states of their organization on the Amendment
Effective Date.

AUTHORIZATION OF AGREEMENTS. The execution and delivery of this Amendment and
the performance of the Credit Agreement have been duly authorized by all
necessary corporate action on the part of Borrower and the other parties
delivering any of such documents, as the case may be. The organizational
documents of the Borrower, the REIT and the Guarantors have not been modified in
any material respect since September 20, 2000.

NO CONFLICT. The execution and delivery by Borrower and the Guarantors of this
Amendment and the performance of the Credit Agreement by Borrower do not and
will not (i) violate any provision of any law or any governmental rule or
regulation applicable to Borrower or any of its Subsidiaries, their respective
Organization Documents or any order, judgment or decree of any court or other
agency of government binding on Borrower, the REIT or any of their Subsidiaries,
(ii) conflict with, result in a breach of or constitute (with due notice or
lapse of time or both) a default under any Contractual Obligation of Borrower,
the REIT or any of their Subsidiaries, (iii) result in or require the creation
or imposition of any Lien upon any of the properties or assets of Borrower, the
REIT or any of their Subsidiaries, or (iv) require any approval of stockholders
or any approval or consent of any Person under any Contractual Obligation of
Borrower, the REIT or any of their Subsidiaries.

GOVERNMENTAL CONSENTS. The execution and delivery by Borrower and the Guarantors
of this Amendment and the performance by Borrower and the Guarantors under the
Credit Agreement

                                       4

<PAGE>   5

do not and will not require any registration with, consent or approval of, or
notice to, or other action to, with or by, any federal, state or other
governmental authority or regulatory body.

BINDING OBLIGATION. The Credit Agreement, as amended by this Amendment, has been
duly executed and delivered by Borrower and the Guarantors, as applicable, and
is enforceable against Borrower and/or the Guarantors, as applicable, in
accordance with its respective terms, except as may be limited by bankruptcy,
insolvency, reorganization, moratorium or similar laws relating to or limiting
creditors' rights generally or by equitable principles relating to
enforceability.

INCORPORATION OF REPRESENTATIONS AND WARRANTIES FROM CREDIT AGREEMENT. The
representations and warranties contained in Section 5 of the Credit Agreement
are and will be true, correct and complete in all material respects on and as of
the Amendment Effective Date to the same extent as though made on and as of such
date, except representations and warranties solely to the extent such
representations and warranties specifically relate to an earlier date, in which
case they were true, correct and complete in all material respects on and as of
such earlier date.

ACKNOWLEDGEMENT AND CONSENT

                  Guarantors are party to that certain Payment Guaranty of REIT
and of Preferred Stock Subsidiaries (Oxford Guarantors) dated as of September
20, 2000, that certain Payment Guaranty of REIT and of Preferred Stock
Subsidiaries (Non-Oxford Guarantors) dated as of September 20, 2000, that
certain Payment Guaranty of Non-Preferred Stock Subsidiaries (Oxford Guarantors)
dated as of September 20, 2000, and that certain Payment Guaranty of
Non-Preferred Stock Subsidiaries (Non-Oxford Guarantors) dated as of September
20, 2000, pursuant to which Guarantors have guarantied the Obligations. Nothing
in this Section 4 shall be construed to make the Guarantors a party to the
Credit Agreement or to create any obligation in respect thereof except pursuant
to each Guaranty.

                  Each Guarantor hereby acknowledges that it has reviewed the
terms and provisions of the Credit Agreement and this Amendment and consents to
the amendment of the Credit Agreement effected pursuant to this Amendment. Each
Guarantor hereby confirms that each Guaranty to which it is a party or otherwise
bound will continue to guaranty or secure, as the case may be, to the fullest
extent possible the payment and performance of all of the "Indebtedness" (as
defined in the applicable Guaranty), including without limitation the payment
and performance of all such "Indebtedness," as the case may be, with respect to
the Obligations of Borrower now or hereafter existing under or in respect of the
Credit Agreement (as amended hereby) and the Notes defined therein.

                  Each Guarantor acknowledges and agrees that any Guaranty to
which it is a party or otherwise bound shall continue in full force and effect
and that all of its obligations thereunder shall be valid and enforceable and
shall not be impaired or limited by the execution or effectiveness of this
Amendment. Each Guarantor represents and warrants that all representations and
warranties contained in the Credit Agreement and the Guaranty to which it is

                                       5

<PAGE>   6

a party or otherwise bound are true, correct and complete in all material
respects on and as of the Amendment Effective Date to the same extent as though
made on and as of that date, except to the extent such representations and
warranties specifically relate to an earlier date, in which case they were true,
correct and complete in all material respects on and as of such earlier date.

                  Each Guarantor acknowledges and agrees that (i)
notwithstanding the conditions to effectiveness set forth in this Amendment,
such Guarantor is not required by the terms of the Credit Agreement or any other
Loan Document to consent to the amendments to the Credit Agreement effected
pursuant to this Amendment and (ii) nothing in the Credit Agreement, this
Amendment or any other Loan Document shall be deemed to require the consent of
such Guarantor to any future amendments to the Credit Agreement.

MISCELLANEOUS

REFERENCE TO AND EFFECT ON THE CREDIT AGREEMENT AND THE OTHER LOAN DOCUMENTS.

On and after the Amendment Effective Date, each reference in the Credit
Agreement to "this Agreement", "hereunder", "hereof", "herein" or words of like
import referring to the Credit Agreement, and each reference in the other Loan
Documents to the "Credit Agreement", "thereunder", "thereof" or words of like
import referring to the Credit Agreement shall mean and be a reference to the
Credit Agreement, as amended by this Amendment.

Except as specifically amended by this Amendment, the Credit Agreement and the
other Loan Documents shall remain in full force and effect and are hereby
ratified and confirmed.

The execution, delivery and performance of this Amendment shall not, except as
expressly provided herein, constitute a waiver of any provision of, or operate
as a waiver of any right, power or remedy of Administrative Agent or any Lender
under, the Credit Agreement or any of the other Loan Documents.

FEES AND EXPENSES. Borrower acknowledges that all reasonable costs, fees and
expenses incurred by Administrative Agent and its counsel with respect to this
Amendment and the documents and transactions contemplated hereby shall be for
the account of Borrower.

HEADINGS. Section and subsection headings in this Amendment are included herein
for convenience of reference only and shall not constitute a part of this
Amendment for any other purpose or be given any substantive effect.

COUNTERPARTS; EFFECTIVENESS. This Amendment may be executed in any number of
counterparts and by different parties hereto in separate counterparts, each of
which when so executed and delivered shall be deemed an original, but all such
counterparts together shall constitute but one and the same instrument;
signature pages may be detached from multiple separate counterparts and attached
to a single counterpart so that all signature pages are physically attached to
the same document. This Amendment shall become effective upon the execution of a
counterpart hereof

                                       6

<PAGE>   7

by Borrower, Administrative Agent, DePfa and New York Life, and receipt by
Borrower and Administrative Agent of written, facsimile or telephonic
notification of such execution and authorization of delivery thereof.

                 [SIGNATURES ON ATTACHED PAGES S-1 THROUGH S-16]

                                       7
<PAGE>   8

                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed and delivered as of the day and year first written
above.

                                    BORROWER

                                            AIMCO PROPERTIES, L.P.,
                                            a Delaware limited partnership

                                            By:  AIMCO-GP, INC.,
                                            a Delaware corporation
                                            Its:  General Partner

                                            By:  /s/ PETER K. KOMPANIEZ
                                                --------------------------------
                                                     Peter K. Kompaniez
                                                     President

                                            AIMCO/BETHESDA HOLDINGS INC.,
                                            a Delaware corporation

                                            By:  /s/ PETER K. KOMPANIEZ
                                                --------------------------------
                                                     Peter K. Kompaniez
                                                     President

                                            NHP MANAGEMENT COMPANY,
                                            a District of Columbia corporation

                                            By:  /s/ PATRICK FOYE
                                                --------------------------------
                                                     Patrick Foye
                                                     Executive Vice President

                                      S-1

<PAGE>   9

                                            BANK OF AMERICA

                                            BANK OF AMERICA, N.A.,
                                            as Administrative Agent

                                            By: /s/ ROBERT N. ALLEN
                                               ---------------------------------
                                            Name:   Robert N. Allen
                                            Title:  Principal

                                      S-2

<PAGE>   10

                                 DEPFA BANK AG

                                 DEPFA BANK AG,
                                 as a Lender

                                 By:      /s/ DAGMAR NIERSTE /s/ NICKLES - TESKE
                                          --------------------------------------
                                          Name:
                                          Title:

                                      S-3

<PAGE>   11

                                            NEW YORK LIFE INSURANCE COMPANY

                                            NEW YORK LIFE INSURANCE COMPANY,
                                            as a Lender

                                            By:      /s/ KEVIN G. SMITH
                                                     ---------------------------
                                                     Name: Kevin G. Smith
                                                     Title:

                                      S-4

<PAGE>   12

The undersigned Guarantors hereby execute this Amendment solely for the purposes
of acknowledging the same and consenting thereto in accordance with Section 4
thereof.

REIT AND PREFERRED STOCK SUBSIDIARIES:

APARTMENT INVESTMENT AND
MANAGEMENT COMPANY,

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter K. Kompaniez
         President

AIMCO/NHP HOLDINGS, INC.,

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter K. Kompaniez
         President

NHP A&R SERVICES, INC.,

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter K. Kompaniez
         President

AIMCO/NHP PROPERTIES, INC.,

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter K. Kompaniez
         President

                                      S-5

<PAGE>   13

NHP MANAGEMENT COMPANY

By:      /s/ PATRICK FOYE
         -----------------------------------
         Patrick Foye
         Executive Vice President

AIMCO/BETHESDA HOLDINGS, INC.

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter Kompaniez
         President

NON-PREFERRED STOCK SUBSIDIARIES:

Oxford Realty Financial Group, Inc.

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter K. Kompaniez
         President

Oxford Holding Corporation

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter K. Kompaniez
         President

AIMCO/Bethesda Holdings Acquisitions, Inc.
AIMCO/Bethesda Holdings Acquisitions II, Inc.

By:      /s/ PETER K. KOMPANIEZ
         -----------------------------------
         Peter K. Kompaniez
         President

                                      S-6

<PAGE>   14

AIMCO/Colonel I, L.P.

By:      AIMCO Holdings, L.P.,
         Its General Partner

         By:      AIMCO Holdings QRS, Inc.,
                  Its General Partner

                  By:      /s/ PETER KOMPANIEZ
                           -----------------------------
                           Peter Kompaniez
                           President

                                      S-7
<PAGE>   15

AIMCO/Bethesda GP, L.L.C.
AIMCO/Bethesda Employee, L.L.C.
AIMCO/Bethesda II, LLC
AIMCO/Akron One, L.L.C.
AIMCO/Allentown, L.L.C.
AIMCO/Allview, L.L.C.
AIMCO/Apollo, L.L.C.
AIMCO/Augusta, L.L.C.
AIMCO/Beach, L.L.C.
AIMCO/Beville, L.L.C.
AIMCO/Brandermill, L.L.C.
AIMCO/Brandon, L.L.C.
AIMCO/Casselberry, L.L.C.
AIMCO/Charleston, L.L.C.
AIMCO/Chickasaw, L.L.C.
AIMCO/Chimneytop, L.L.C.
AIMCO/Farmingdale, L.L.C.
AIMCO/Fox Valley, L.L.C.
AIMCO/Greensboro, L.L.C.
AIMCO/Greenville, L.L.C.
AIMCO/Kettering, L.L.C.
AIMCO/Kings, L.L.C.
AIMCO/Kirkman, L.L.C.
AIMCO/Lake Ridge, L.L.C.
AIMCO/Lakeridge California, L.L.C.
AIMCO/Lantana, L.L.C.
AIMCO/Laurel, L.L.C.
AIMCO/Lexington, L.L.C.
AIMCO/Middletown, L.L.C.
AIMCO/Nashua, L.L.C.
AIMCO/Newport, L.L.C.
AIMCO/North Gate, L.L.C.
AIMCO/North Woods, L.L.C.
AIMCO/Ocala, L.L.C.
AIMCO/Palm Aire, L.L.C.
AIMCO/Palm Beach, L.L.C.
AIMCO/Pinellas, L.L.C.
AIMCO/Runaway Bay, L.L.C.
AIMCO/Salem, L.L.C.
AIMCO/San Bruno, L.L.C.

                                      S-8

<PAGE>   16

AIMCO/Schaumburg, L.L.C.
AIMCO/Southridge, L.L.C.
AIMCO/Spartanburg, L.L.C.
AIMCO/Tidewater, L.L.C.
AIMCO/Travis One, L.P.
AIMCO/Westridge, L.L.C.
AIMCO/Bethesda Williamsburg, L.L.C.

By:      AIMCO Properties, L.P.,
         Its Sole Member

         By:      AIMCO-GP, Inc.

                  By:      /s/ PETER K. KOMPANIEZ
                           ---------------------------
                           Peter K. Kompaniez
                           President

AIMCO Anchorage, L.P.
AIMCO Bay Club, L.P.
AIMCO Bridgewater, L.P.
AIMCO Copperfield, L.P.
AIMCO Crows Nest, L.P.
AIMCO Group, L.P.
AIMCO Hampton Hill, L.P.
AIMCO Hastings Place, L.P.
AIMCO LT, L.P.
AIMCO Oak Falls, L.P.
AIMCO Park at Cedar Lawn, L.P.
AIMCO Peppermill Place, L.P.
AIMCO Recovery Fund, L.P.
AIMCO Seaside Point, L.P.
AIMCO Signature Point, L.P.
AIMCO Stirling Court, L.P.
AIMCO Sunbury, L.P.
AIMCO Township at Highlands, L.P.
AIMCO UT, L.P.
AIMCO West Trails, L.P.

By:      AIMCO Holdings, L.P., as their general partner

         By:      AIMCO Holdings QRS, Inc., its
                  general partner

                  By:      /s/ PETER K. KOMPANIEZ
                           ---------------------------
                           Peter K. Kompaniez
                           President

                                      S-9

<PAGE>   17

AIMCO Bay Club II, L.P.

By:      AIMCO Bay Club, L.P., its general partner

         By:      AIMCO Holdings, L.P., as their general partner

                  By:      AIMCO Holdings QRS, Inc., its
                           general partner

                           By:      /s/ PETER K. KOMPANIEZ
                                    ----------------------------
                                    Peter K. Kompaniez
                                    President

AIMCO Holdings, L.P.

By:      AIMCO Holdings QRS, Inc., its
         general partner

                  By:      /s/ PETER K. KOMPANIEZ
                           ---------------------------
                           Peter K. Kompaniez
                           President

Ambassador CRM Florida Partners, L.P.

By:      Ambassador Florida Partners Limited Partnership, as its
         general partner

         By:      Ambassador Florida Partners, Inc., as its
                  general partner

                  By:      /s/ PETER K. KOMPANIEZ
                           ---------------------------
                           Peter K. Kompaniez
                           President

                                      S-10

<PAGE>   18

Ambassador I, L.P.

By:      Ambassador I, Inc., its general partner

         By:      /s/ PETER K. KOMPANIEZ
                  ------------------------------
                  Peter K. Kompaniez
                  President

Ambassador II, L.P.

By:      Ambassador II, Inc., its general partner

         By:      /s/ PETER K. KOMPANIEZ
                  ------------------------------
                  Peter K. Kompaniez
                  President

Ambassador VIII, L.P.

By:      Ambassador VIII, Inc., its general partner

         By:      /s/ PETER K. KOMPANIEZ
                  ------------------------------
                  Peter K. Kompaniez
                  President

Ambassador IX, L.P.

By:      Ambassador IX, Inc., its general partner

         By:      /s/ PETER K. KOMPANIEZ
                  ------------------------------
                  Peter K. Kompaniez
                  President

                                      S-11

<PAGE>   19

Ambassador Apartments, L.P.
Property Asset Management Services, L.P.

By:      AIMCO Properties, L.P., as their general partner

         By:      AIMCO-GP, Inc., its general partner

                  By:      /s/ PETER K. KOMPANIEZ
                           ------------------------------
                           Peter K. Kompaniez
                           President

Ambassador X, L.P.

By:      Ambassador X, Inc., its general partner

         By:      /s/ PETER K. KOMPANIEZ
                  ------------------------------
                  Peter K. Kompaniez
                  President

Williamsburg L.P.

By:      Ambassador IX, L.P., its general partner

         By:      Ambassador IX, Inc., its general partner

                  By:      /s/ PETER K. KOMPANIEZ
                           ------------------------------
                           Peter K. Kompaniez
                           President

                                      S-12

<PAGE>   20

Property Asset Management Services-California, LLC

By:      Property Asset Management Services, L.P., its managing
         general partner

         By:      AIMCO Properties, L.P., its general partner

                  By:      AIMCO-GP, Inc., its general partner

                           By:      /s/ PETER K. KOMPANIEZ
                                    ---------------------------
                                    Peter K. Kompaniez
                                    President

NHP Congress Management L.P.

         By:      NHP-HG Six, Inc., its general partner

                  By:      /s/ PETER K. KOMPANIEZ
                           ----------------------------
                           Peter K. Kompaniez
                           President

                                      S-13

<PAGE>   21

NPI-AP Management, L.P.

By:      NPI Property Management Corporation, its
         general partner

         By:      /s/ PETER K. KOMPANIEZ
                  ---------------------------------
                  Peter K. Kompaniez
                  President

AIMCO Residential Group, L.P.

By:      AG Management, L.L.C., its general partner

         By:      NHP Management Company, its
                  managing member

                  By:      /s/ PATRICK FOYE
                           ------------------------
                           Patrick Foye
                           Executive Vice President

Insignia Properties, L.P.

By:      AIMCO/IPT, Inc., its general partner

         By:      /s/ PETER K. KOMPANIEZ
                  ---------------------------------
                  Peter K. Kompaniez
                  President

AIMCO Calhoun, Inc.
AIMCO Holdings QRS, Inc.
AIMCO LJ Tucson, Inc.
AIMCO Properties Finance Corp.
AIMCO/Brant Rock, Inc.
AIMCO/Beacon Hill, Inc.
AIMCO/Blossomtree, Inc.
AIMCO/Colonnade, Inc.
AIMCO/Foothills, Inc.
AIMCO/Foxbay, Inc.
AIMCO/Foxtree, Inc.
AIMCO/Freedom Place, Inc.
AIMCO/Grovetree, Inc.

                                      S-14

<PAGE>   22

AIMCO/Hazeltree, Inc.
AIMCO/Hiddentree, Inc.
AIMCO/IPT, Inc.
AIMCO/Islandtree, Inc.
AIMCO/Olmos, Inc.
AIMCO/Orchidtree, Inc.
AIMCO/OTC QRS, Inc.
AIMCO/Pine Creek, Inc.
AIMCO/Polo Park, Inc.
AIMCO/Quailtree, Inc.
AIMCO/Rivercrest, Inc.
AIMCO/Sand Castles, Inc.
AIMCO/Sand Pebble, Inc.
AIMCO/Shadetree, Inc.
AIMCO/Shadow Lake, Inc.
AIMCO/Silktree, Inc.
AIMCO/Surrey Oaks, Inc.
AIMCO/Tall Timbers, Inc.
AIMCO/The Hills, Inc.
AIMCO/Timbertree, Inc.
AIMCO/Twinbridge, Inc.
AIMCO/Wickertree, Inc.
AIMCO/Wildflower, Inc.
AIMCO/Windsor Landing, Inc.
AIMCO/Woodhollow, Inc.
AIMCO/Wydewood, Inc.
AIMCO/Yorktree, Inc.
AIMCO-LP, Inc.
AIMCO-GP, Inc.
Ambassador I, Inc.
Ambassador II, Inc.
Ambassador IV, Inc.
Ambassador V, Inc.
Ambassador VIII, Inc.
Ambassador Texas, Inc.
Ambassador X, Inc.
Ambassador XI, Inc.
Ambassador Florida Partners Inc.
Angeles Realty Corporation II
NHP Multi-Family Capital Corporation
NHP Real Estate Corporation
A.J. Two, Inc.
AIMCO Equity Services, Inc.

                                      S-15

<PAGE>   23

NHP-HDV Ten, Inc.
NHP-HDV Fourteen, Inc.
NHP-HDV Sixteen, Inc.
NHP-HDV 20, Inc.
NHP-HS Two, Inc.
Broadstreet Management, Inc.
DBL Properties Corporation
Colony of Springdale Properties, Inc.
SF General, Inc.
CPF XIV/St. Charleston, Inc.
CPF XIV/Torrey Pines, Inc.
CPF XIV/Sun River, Inc.
CPF XIV/Lakeside Place, Inc.
ConCap CCP/IV Stratford Place Properties, Inc.
ConCap CCP/IV River's Edge Properties, Inc.
ConCap Equities, Inc.
ConCap Holdings, Inc.
PRA, Inc.
National Property Investors, Inc.

         By:      /s/ PETER K. KOMPANIEZ
                  --------------------------------
                  Peter K. Kompaniez
                  President

OXFORD TAX EXEMPT FUND II CORPORATION

By:  /s/ PETER KOMPANIEZ
    ------------------------------------------
Name:  Peter Kompaniez
Title: President

OXFORD TAX EXEMPT FUND II LIMITED PARTNERSHIP

By:      Oxford Tax Exempt Fund II Corporation,
         Its General Partner

         By:  /s/ PETER KOMPANIEZ
            ----------------------------------
         Name:  Peter Kompaniez
         Title: President

                                      S-16<PAGE>   1
                                                                  EXHIBIT 10.1

                               FOURTH AMENDMENT TO
                          LIMITED FORBEARANCE AGREEMENT

         THIS FOURTH AMENDMENT TO LIMITED FORBEARANCE AGREEMENT (the
"Amendment"), dated as of April 13, 2001, is by and among Doskocil Manufacturing
Company, Inc. ("Borrower"), the financial institutions listed on the signature
pages hereof (collectively, the "Lenders"), and Bank of America, N.A., as
Administrative Agent ("Administrative Agent") for the Lenders.

                                    RECITALS:

A. Borrower, Administrative Agent and Lenders have entered into that certain
Limited Forbearance Agreement (as amended, the "Agreement") dated as of February
14, 2001, as amended by that certain First Amendment to Limited Forbearance
Agreement dated as of February 28, 2001, Second Amendment to Limited Forbearance
Agreement dated as of March 12, 2001, and Third Amendment to Limited Forbearance
Agreement dated as of March 26, 2001.

B.

C. Borrower, Westar Capital II LLC and Westar Capital have requested that the
Administrative Agent and the Lenders amend the Agreement, and the Administrative
Agent and the Lenders have agreed to do so upon the terms herein set forth.

D.

E. NOW, THEREFORE, in consideration of the premises herein contained and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

                                   ARTICLE 1

                                   Definitions

ARTICLE 1.1 Definitions. Capitalized terms used in this Amendment, to the extent
not otherwise defined herein, shall have the same meanings as in the Agreement,
as amended hereby.

                                   ARTICLE 1

                                   Amendments

ARTICLE 1.1 Amendment to Limited Forbearance. Effective as of the date hereof,
Section 2.1(b) of the Agreement is hereby amended by deleting therefrom the
reference to "March 31, 2001" and substituting in lieu thereof "June 29, 2001".

<PAGE>   2

ARTICLE 1.1 Amendment to Other Agreements. Effective as of the date hereof,
Section 2.2(b) of the Agreement is hereby amended to read as follows:

ARTICLE 1.2

                  "(b) Effective as of the date hereof, accrued but unpaid
         interest on the Advances outstanding from time to time and the fee
         payable pursuant to Section 2.15(f)(i) with respect to outstanding
         Letters of Credit shall be due and payable on the 15th day of each
         calendar month commencing on May 15, 2001, on the last day of each
         calendar month, and on the Revolving Commitment Maturity Date, the
         Facility A Term Loan Maturity Date or the Facility B Term Loan Maturity
         Date as appropriate."

ARTICLE 1.1 Other Amendments. Effective as of the date hereof, Section 2.2 of
the Agreement is hereby amended to add thereto the following subsections (i) and
(j):

ARTICLE 1.2

                  "(i) The Borrower will deliver to the Administrative Agent the
         following financial reports:

                           (a)      the Borrower will deliver on or before
                                    Tuesday of each week a 13-week rolling cash
                                    flow forecast (including forecasting of
                                    receipts and disbursements).

                           (b)      the Borrower will deliver on or before
                                    Tuesday of each week a variance report
                                    delineating all material variances from the
                                    prior week's forecast of receipts and
                                    disbursements.

                           (c)      the Borrower will deliver on or before
                                    Tuesday of each week a report with respect
                                    to its aggregate Eligible Accounts as of the
                                    end of the prior week.

                  (j) Notwithstanding anything to the contrary contained in
         Section 2.5(b) of the Credit Agreement, with respect to the month
         ending on or about April 30, 2001, the Borrower shall be required to
         immediately repay Revolving Credit Advances only to the extent that on
         such date the aggregate principal amount of Revolving Credit Advances
         and Reimbursement Obligations outstanding under the Credit Agreement
         exceed the Borrowing Base then in effect by a sum in excess of
         $100,000."

ARTICLE 1.1 Amendment to Schedule 1. Effective as of the date hereof through and
including June 29, 2001, Schedule 1 to the Agreement is hereby amended and
restated to read as follows:

ARTICLE 1.2

ARTICLE 1.3 1. Events of Default by reason of the Borrower's failure to comply
with Section 7.11 (Maximum Leverage Ratio), Section 7.12 (Minimum Fixed Charge
Coverage Ratio), Section 7.13 (Interest Coverage Ratio), and Section 7.21
(Senior Leverage Ratio) for the Borrower's fiscal quarters ending December 31,
2000 and March 31, 2001, to the extent set forth in the Compliance Certificates
delivered by Borrower to the Administrative Agent on

                                      -2-

<PAGE>   3

February 20, 2001 for the quarter ended December 31, 2000, and on May 11, 2001
for the quarter ended March 31, 2001.

ARTICLE 1.4

ARTICLE 1.5 2. Events of Default by reason of the Borrower's failure to comply
with Section 2.2(k) of certain of the Deeds of Trust.

ARTICLE 1.6

ARTICLE 1.7 3. Events of Default under Section 8.1(o) of the Credit Agreement by
reason of the Specified Investors' failure to make the payments required under
the Support Agreement for Borrower's fiscal quarter ended December 30, 2000, and
March 31, 2001.

ARTICLE 1.8

ARTICLE 1.9 4. Events of Default under Section 8.1(b)(i) and 8.1(j) of the
Credit Agreement by reason of the Borrower's failure to pay the principal
amounts of the Facility A Term Loan Advances and of the Facility B Term Loan
Advances due and payable on March 31, 2001.

ARTICLE 1.10

ARTICLE 1.11 5. An Event of Default under Section 8.1(j) of the Credit Agreement
by reason of the Borrower's failure to make the interest payment due on March
15, 2001, under the Senior Subordinated Notes.

ARTICLE 1.12

ARTICLE 1.13 6. Events of Default (if any) under Section 8.1(g)(v) of the Credit
Agreement as a result of failure to pay when due principal amounts of the
Facility A Term Loan Advances and the Facility B Term Loan Advances, interest
due under the Senior Subordinated Notes, and lease payments.

ARTICLE 1.14

ARTICLE 1.15 7. Events of Default under Section 8.1(m) of the Credit Agreement
with respect to inventory located outside the United States with a value not to
exceed $650,000 and registrations of intellectual property outside the United
States.

                                   ARTICLE 1

                         Representations and Warranties

         The Borrower represents and warrants to the Lenders and the
Administrative Agent that:

ARTICLE 1.1 Authorization; No Conflict. The execution and delivery by the
Borrower of this Amendment and the performance by the Borrower of its
obligations under the Credit Agreement have been duly authorized by all
necessary corporate action, do not require any filing or registration with or
approval or consent of any governmental agency or authority, do not and will not
conflict with, result in any violation of, or constitute any default under any
provision of the certificate of incorporation or by-laws of the Borrower or any
material agreement or other document binding upon or applicable to the Borrower
(or any of its properties) or any law or governmental regulation or court decree
or order applicable to the Borrower, and will not result in or require the
creation or imposition of any Lien on any of the properties of the Borrower
pursuant to the provisions of any agreement binding upon or applicable to the
Borrower.

                                      -3-

<PAGE>   4

ARTICLE 1.2 Due Execution; Enforceability. This Amendment has been duly executed
and delivered by the Borrower and, together with the other Loan Documents, is a
legal, valid and binding obligation of the Borrower, enforceable in accordance
with its terms subject, as to enforcement only, to bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting the enforceability of the
rights of creditors generally and to general principles of equity (regardless of
whether enforcement is sought in equity or at law).

ARTICLE 1.3

ARTICLE 1.4 Reaffirmation of Representations and Warranties. The representations
and warranties contained in the Credit Agreement and the other Loan Documents
(except for those contained in Sections 4.1(k) and 4.1(u) of the Credit
Agreement, Section 2.1(c) of the Deeds of Trust, and, solely as a result of the
Subject Events, Section 4.1(o) of the Credit Agreement) are true and correct in
all material respects on the date of this Amendment after giving effect to the
effectiveness hereof (other than any such representations and warranties that by
their terms refer to a specific date, in which case as of such specific date).

                                   ARTICLE 1

                              Conditions Precedent

         This Amendment shall become effective as of April 13, 2001, upon
satisfaction of all of the following conditions (such date is herein called the
"Agreement Effective Date"):

ARTICLE 1.1 Receipt of Agreement. The Administrative Agent shall have received
counterparts of this Amendment sufficient in number to provide one for each
Lender, duly executed by the Borrower, the Lenders, the Administrative Agent,
Westar Capital II LLC, and Westar Capital.

ARTICLE 1.2

ARTICLE 1.3 Default. No Default shall have occurred and be continuing other than
any Default which results solely from the Subject Events.

ARTICLE 1.4

ARTICLE 1.5 Payment of Interest and Fees. The Administrative Agent shall have
received on or prior to May 15, 2001, payment of all accrued but unpaid interest
on the Advances through May 15, 2001, and the Borrower shall have paid all
reasonable expenses and fees arising in connection with all matters undertaken
or performed at the request of the Administrative Agent or the Lenders,
including but not limited to all expenses and fees owed to Winstead Sechrest &
Minick P.C. and the Financial Advisor to the extent billed on or prior to the
date hereof.

ARTICLE 1.6

ARTICLE 1.7 Compliance Certificate. The Administrative Agent shall have received
the Compliance Certificate due pursuant to Section 6.4 of the Credit Agreement
for the month ended on or about March 31, 2001, and shall have paid to the
Administrative Agent the amount by which the Revolving Credit Advances and
Reimbursement Obligations outstanding exceed the Borrowing Base reflected in
such Compliance Certificate.

ARTICLE 1.8

                                      -4-
<PAGE>   5

ARTICLE 1.9 Cooperation. The Borrower shall have cooperated with Financial
Advisor and Winstead Sechrest & Minick P.C. in all of their due diligence
inquiries.

ARTICLE 1.10

ARTICLE 1.11 Additional Information. The Administrative Agent shall have
received such additional documents, instruments and information as the
Administrative Agent or its legal counsel, Winstead Sechrest & Minick P.C., may
reasonably request.

ARTICLE 1.12

                                   ARTICLE 2

                                 Miscellaneous.

ARTICLE 1.1 Expenses. The Borrower agrees to pay on demand all reasonable costs
and expenses of the Administrative Agent (including fees, charges and expenses
of counsel for the Administrative Agent and the Financial Advisor) in connection
with the preparation, negotiation, execution, delivery and administration of
this Amendment and the Agreement and all other instruments or documents provided
for herein or therein or delivered or to be delivered hereunder or in connection
herewith or therewith. All obligations provided in this Section 5.1 shall
survive any termination of this Agreement and the Credit Agreement.

ARTICLE 1.2

ARTICLE 1.3 Captions. Section captions used in this Agreement are for
convenience only and shall not affect the construction of this Amendment.

ARTICLE 1.4

ARTICLE 1.5 Governing Law. THIS AMENDMENT SHALL BE A CONTRACT MADE UNDER AND
GOVERNED BY THE LAWS OF THE STATE OF TEXAS, WITHOUT REGARD TO CONFLICT OF LAWS
PRINCIPLES. Wherever possible each provision of this Amendment shall be
interpreted in such manner as to be effective and valid under applicable laws,
but if any provision of this Amendment shall be prohibited by or invalid under
such laws, such provision shall be ineffective to the extent of such prohibition
or invalidity, without invalidating the remainder of such provision or the
remaining provisions of this Amendment.

ARTICLE 1.6

ARTICLE 1.7 Counterparts. This Amendment may be executed in any number of
counterparts, and by the parties hereto on the same or separate counterparts,
and each such counterpart, when executed and delivered (including by facsimile),
shall be deemed to be an original, but all such counterparts shall together
constitute but one and the same amendment. Telecopies of signatures shall be
binding and effective as originals.

ARTICLE 1.8

ARTICLE 1.9 Reference to Loan Documents. The Credit Agreement and the other Loan
Documents shall remain in full force and effect and are hereby ratified in all
respects. The Borrower hereby additionally ratifies and confirms its obligations
pursuant to the Temporary Credit Facility and all documents and instruments
executed pursuant thereto or in connection therewith and further agrees that its
obligations thereunder are not subject to any claim, offset, defense or
counterclaim.

ARTICLE 1.10

                                      -5-
<PAGE>   6

ARTICLE 1.11 Successors and Assigns. This Agreement shall be binding upon the
parties hereto and their respective successors and assigns, and shall inure to
the sole benefit of the parties hereto and the successors and assigns of the
Administrative Agent and the Lenders. Notwithstanding the foregoing, the
Borrower shall not assign its rights or duties hereunder without the consent of
the Administrative Agent and the Lenders.

ARTICLE 1.12

ARTICLE 1.13               RELEASE.

ARTICLE 1.14

         (a) The Borrower hereby unconditionally and irrevocably remises,
         acquits, and fully and forever releases and discharges the
         Administrative Agent and the Lenders and all respective affiliates and
         subsidiaries of the Administrative Agent and the Lenders, their
         respective officers, servants, employees, agents, attorneys,
         principals, directors and shareholders, and their respective heirs,
         legal representatives, successors and assigns (collectively, the
         "Released Lender Parties") from any and all claims, demands, causes of
         action, remedies, suits, damages and liabilities (collectively, the
         "Borrower Claims") of any nature whatsoever, whether now known,
         suspected or claimed, whether arising under common law, in equity or
         under statute, which the Borrower ever had or now has against the
         Released Lender Parties which may have arisen at any time on or prior
         to the date of this Agreement and which were in any manner related to
         any of the Loan Documents or the enforcement or attempted enforcement
         by the Administrative Agent or the Lenders of rights, remedies or
         recourses related thereto.

         (a) The Borrower covenants and agrees never to commence, voluntarily
         aid in any way, prosecute or cause to be commenced or prosecuted
         against any of the Released Lender Parties any action or other
         proceeding based upon any of the Borrower Claims which may have arisen
         at any time on or prior to the date of this Agreement and were in any
         manner related to any of the Loan Documents.

         (a) The agreements of the Borrower set forth in this Section 5.7 shall
         survive termination of this Agreement.

ARTICLE 1.1 Acknowledgment of the Borrower. The Borrower acknowledges and agrees
that the Lenders and the Administrative Agent executing this Amendment have done
so in their sole discretion and without any obligation. The Borrower further
acknowledges and agrees that any action taken or not taken by the Lenders or the
Administrative Agent prior to, on or after the date hereof shall not constitute
a waiver or modification of any terms, covenant or provision of any Loan
Document other than as specified herein or prejudice any rights or remedies
other than as specified herein which the Administrative Agent or any Lender now
has or may have in the future under any Loan Document, applicable law or
otherwise, all of which rights and remedies are expressly reserved by the
Administrative Agent and the Lenders. The Borrower hereby ratifies and confirms
its obligations under the Loan Documents.

ARTICLE 1.2

                                      -6-
<PAGE>   7

ARTICLE 1.3 Loan Document. This Amendment is a Loan Document and is subject to
all provisions of the Credit Agreement applicable to Loan Documents, all of
which are incorporated in this Amendment by reference the same as if set forth
in this Amendment verbatim.

ARTICLE 1.4

ARTICLE 1.5 NO ORAL AGREEMENTS. THIS WRITTEN AGREEMENT AND THE OTHER LOAN
DOCUMENTS REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS AMONG THE
PARTIES.

ARTICLE 1.6

ARTICLE 1.7

                 [Balance of this Page Intentionally Left Blank]

                                      -7-
<PAGE>   8

       Executed and delivered as of the day and year first above written.

                                          BORROWER:

                                          DOSKOCIL MANUFACTURING COMPANY, INC.

                                          By /s/ SUSAN RICHMAN
                                            ----------------------------------
                                            Name: Susan Richman
                                                 -----------------------------
                                            Title: Vice-President & CFO
                                                  ----------------------------

                                      -8-
<PAGE>   9

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                     ADMINISTRATIVE AGENT:

                                     BANK OF AMERICA, N.A., as
                                     Administrative Agent

                                     By /s/ JOHN W. WOODIEL III
                                       ----------------------------------
                                         John W. Woodiel III
                                         Managing Director

                                      -9-
<PAGE>   10

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                     LENDERS

                                     BANK OF AMERICA, N.A.

                                     By /s/ JOHN W. WOODIEL III
                                       ----------------------------------
                                         John W. Woodiel III
                                         Managing Director

                                      -10-
<PAGE>   11

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    ARK CLO 2000-1, LIMITED

                                    By:  Patriarch Partners, LLC,
                                            its Collateral Manager

                                    By: /s/ LYNN TILTON
                                       ----------------------------------------
                                       Name: Lynn Tilton
                                            -----------------------------------
                                       Title: Authorized Signature
                                             ----------------------------------

                                      -11-
<PAGE>   12

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    BANK AUSTRIA CREDITANSTALT
                                    CORPORATE FINANCE, INC.

                                    By: /s/ AUTHORIZED SIGNATURE
                                       ----------------------------------------
                                       Name:
                                            -----------------------------------
                                       Title:
                                             ----------------------------------

                                    By: /s/ AUTHORIZED SIGNATURE
                                       ----------------------------------------
                                       Name:
                                            -----------------------------------
                                       Title:
                                             ----------------------------------

                                      -12-
<PAGE>   13

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    COMERICA BANK

                                    By:  /s/  ROBIN KAIN
                                       ----------------------------------------
                                       Name:  Robin Kain
                                            -----------------------------------
                                       Title: Vice-President
                                             ----------------------------------

                                      -13-

<PAGE>   14

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    HSBC BANK USA

                                    By:   /s/ DESMOND C. ENGLISH
                                       ----------------------------------------
                                       Name:  Desmond C. English
                                            -----------------------------------
                                       Title: Associate Director
                                             ----------------------------------

                                      -14-
<PAGE>   15

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    IMPERIAL BANK

                                    By:   /s/ ROBIN KAIN
                                       ----------------------------------------
                                       Name:  Robin Kain
                                            -----------------------------------
                                       Title: Vice-President
                                             ----------------------------------

                                      -15-
<PAGE>   16

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    ARCHIMEDES FUNDING, LLC.

                                    BY:  ING Capital Advisors LLC,
                                         as Collateral Manager

                                    By:   /s/  JONATHAN DAVID
                                       ----------------------------------------
                                       Name:   Jonathan David
                                            -----------------------------------
                                       Title:  Vice-President
                                             ----------------------------------

                                      -16-

<PAGE>   17

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    ML CLO XII PILGRIM AMERICA (CAYMAN) Ltd.

                                    By: ING Pilgrim Investments Inc.,
                                        as its investment manager

                                    By:   /s/  DANIEL A. NORMAN
                                       ----------------------------------------
                                       Name:   Daniel A. Norman
                                            -----------------------------------
                                       Title:  Senior Vice President
                                             ----------------------------------

                                      -17-
<PAGE>   18

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    MORGAN STANLEY DEAN WITTER
                                    PRIME INCOME TRUST

                                    By:   /s/ PETER GEWIRTZ
                                       ----------------------------------------
                                       Name:  Peter Gewirtz
                                            -----------------------------------
                                       Title: Vice President
                                             ----------------------------------

                                      -18-
<PAGE>   19

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

                                    KZH SOLEIL LLC

                                    By:  /s/  AUTHORIZED SIGNATURE
                                       ----------------------------------------
                                       Name:
                                            -----------------------------------
                                       Title: Authorized Agent
                                             ----------------------------------

                                      -19-
<PAGE>   20

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

         Long Drive Management Trust agrees on behalf of Tri-Links Investment
Trust to the terms of the Limited Forbearance Agreement dated as of February 14,
2001, as amended by First Amendment to Limited Forbearance Agreement dated as of
February 28, 2001, Second Amendment to Limited Forbearance Agreement dated as of
March 12, 2001, Third Amendment to Limited Forbearance Agreement dated as of
March 26, 2001, and Fourth Amendment to Limited Forbearance Agreement dated as
of April 13, 2001 (as amended, the "Agreement") solely in its capacity as a
Lender, it being understood that the terms of the Agreement shall not apply to
Tri-Links Investment Trust in its capacity as a holder of bonds issued by
Doskocil Manufacturing Company, Inc. or to any other claims against Doskocil
Manufacturing Company, Inc. held by Tri-Links Investment Trust.

                                    TRI-LINKS INVESTMENT TRUST

                                    By: /s/ DAVID A. VANASKEY, JR.
                                       ----------------------------------------
                                       Name: David A. Vanaskey, Jr.
                                            -----------------------------------
                                       Title: Vice President
                                             ----------------------------------

                                      -20-
<PAGE>   21

         Reference is made to that certain Limited Forbearance Agreement (as
amended to date, the "Agreement") dated as of February 14, 2001, among Doskocil
Manufacturing Company, Inc., Bank of America, N.A., as Administrative Agent, and
the Lenders party thereto. Reference is also hereby made to that certain Credit
Agreement dated as of August 12, 1999, among the Borrower, Bank of America, N.A.
as Administrative Agent, and the lenders party thereto. Bank of America, N.A.,
as Administrative Agent and as the sole Lender thereunder hereby agrees to
forbear from exercising the rights and remedies available to them with respect
to the Borrower only (and not with respect to any other Obligor as defined
therein or with respect to the Senior Subordinated Notes or the holders thereof)
under such Credit Agreement and the other Loan Documents as defined therein as a
result of Events of Default which exist thereunder solely as a result of the
Subject Events for the period and to the extent specified in this Agreement.

         Executed as of April 13, 2001.

                                    BANK OF AMERICA, N.A., as
                                    Administrative Agent and as Lender

                                    By: /s/ JOHN W. WOODIEL III
                                       ----------------------------------------
                                        John W. Woodiel III
                                        Managing Director

                                      -21-
<PAGE>   22

         SIGNATURE PAGE to Fourth Amendment to Limited Forbearance Agreement
dated as of April 13, 2001, among Doskocil Manufacturing Company, Inc., Bank of
America, N.A., as Administrative Agent, and the Lenders party thereto.

         ACKNOWLEDGED AND AGREED to by the following Persons, each of whom
hereby acknowledges and agrees that its obligations under the Support Agreement
are not released, diminished, impaired, reduced, or otherwise adversely affected
by the Agreement as amended hereby, and consents and agrees to this Amendment's
execution and delivery.

                                    WESTAR CAPITAL II LLC

                                    By: /s/ JOHN W. CLARK
                                       ----------------------------------------
                                       Name: John W. Clark
                                            -----------------------------------
                                       Title: Managing Partner
                                             ----------------------------------

                                    WESTAR CAPITAL

                                    By: /s/ JOHN W. CLARK
                                       ----------------------------------------
                                       Name: John W. Clark
                                            -----------------------------------
                                       Title: Managing Partner
                                             ----------------------------------

                                      -22-

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