Document:

<PAGE>
                                                                     EXHIBIT 4.1

                                                               EXECUTION VERSION

                           FIFTH AMENDMENT dated as of April 1, 2005 (this
                  "Amendment"), to the CREDIT AGREEMENT dated as of October 11,
                  2001 (as amended, supplemented or otherwise modified from time
                  to time, the "Credit Agreement"), among LAND O'LAKES, INC., a
                  cooperative corporation organized under the laws of the State
                  of Minnesota (the "Borrower"), the several banks and other
                  financial institutions and entities from time to time party
                  thereto (the "Lenders"), and JPMORGAN CHASE BANK, N.A.
                  (formerly known as "JPMorgan Chase Bank" and formerly known as
                  "The Chase Manhattan Bank"), as administrative agent (in such
                  capacity, the "Administrative Agent").

         A. The Borrower has requested that the Lenders agree to amend the asset
sale provision of the Credit Agreement as set forth herein.

         B. The Required Lenders are willing to effect such amendment on the
terms and subject to the conditions of this Amendment.

         C. Capitalized terms used but not defined herein shall have the
meanings assigned to such terms in the Credit Agreement, as amended hereby.

         Accordingly, in consideration of the mutual agreements herein contained
and other good and valuable consideration, the sufficiency and receipt of which
are hereby acknowledged, the parties hereto agree as follows:

         SECTION 1. Amendment of Section 6.05 of the Credit Agreement. The
Credit Agreement is hereby amended, effective as of the Amendment Effective Date
(as defined below), as follows:

         (a) Amendment of Section 1.01. Section 1.01 is hereby amended by:
inserting the following definitions in the appropriate alphabetical order
therein:

                  'Fifth Amendment' means the Fifth Amendment, dated as of April
         1, 2005, to this Agreement.

                  'Fifth Amendment Effective Date' means the date on which the
         Fifth Amendment became effective in accordance with Section 3 thereof.

         (b) Amendment of Subsection 6.05(d). Subsection 6.05(d) is amended to
read in its entirety as follows:

         "(d) sales, transfers and other dispositions of assets (other than
sales, transfers or dispositions of less than 100% of the Equity Interests in a
Restricted Subsidiary owned by the Borrower and the Restricted Subsidiaries)
that are not permitted by any other clause of this Section; provided that (i)
the aggregate fair market value of all assets sold, transferred or otherwise
disposed of in reliance upon this clause (d) shall not

<PAGE>
                                                                               2

exceed (x) $100,000,000 during the fiscal year of the Borrower ended December
31, 2005 and (y) $50,000,000 during any fiscal year of the Borrower thereafter
and (ii) for purposes of clause (i), the fair market value of Equity Interests
in a Restricted Subsidiary shall in any event be deemed to be at least equal to
the sum of the purchase price and all Indebtedness of such Restricted Subsidiary
transferred as part of, or other Indebtedness assumed by the transferee or its
Affiliates in connection with, such sale, transfer or disposition;"

         SECTION 2. Representations and Warranties. To induce the other parties
hereto to enter into this Amendment, the Borrower represents and warrants to
each of the Lenders, the Administrative Agent and the Collateral Agent that, as
of the Amendment Effective Date:

         (a) This Amendment has been duly authorized, executed and delivered by
it and this Amendment and the Credit Agreement, as amended hereby, constitutes
its legal, valid and binding obligation, enforceable against it in accordance
with its terms except as such enforceability may be limited by bankruptcy,
insolvency, reorganization, moratorium or other similar laws affecting
creditors' rights generally and by general principles of equity (regardless of
whether such enforceability is considered in a proceeding at law or in equity).

         (b) The representations and warranties set forth in Article III of the
Credit Agreement are, after giving effect to this Amendment, true and correct in
all material respects on and as of the Amendment Effective Date with the same
effect as though made on and as of the Amendment Effective Date, except to the
extent such representations and warranties expressly relate to an earlier date
(in which case they were true and correct in all material respects as of such
earlier date).

         (c) No Default or Event of Default has occurred and is continuing.

         (d) After giving effect to this Amendment, the Collateral and Guarantee
Requirement has been satisfied.

         SECTION 3. Effectiveness. This Amendment and the amendment of the
Credit Agreement effected hereby shall become effective as of the first date
(the "Amendment Effective Date") on which the following conditions have been
satisfied:

         (a) The Administrative Agent (or its counsel) shall have received duly
executed counterparts hereof that, when taken together, bear the signatures of
(i) the Administrative Agent, (ii) the Borrower and (iii) the Required Lenders.

         (b) The Administrative Agent shall have received a certificate of a
Financial Officer to the effect that the representations and warranties set
forth in Section 2 hereof are true and correct on and as of the Amendment
Effective Date.

                  (c) Each Loan Party that has not executed and delivered this
Amendment shall have entered into a written instrument reasonably satisfactory
to the Administrative

<PAGE>
                                                                               3

Agent pursuant to which it confirms that it consents to this Amendment and that
the Security Documents to which it is party will continue to apply in respect of
the Credit Agreement, as amended hereby, and the Obligations thereunder.

         (d) The Administrative Agent shall have received all fees and other
amounts due from any Loan Party hereunder or under the Credit Agreement or any
other Loan Document on or prior to the Amendment Effective Date and, to the
extent invoiced on or prior to the Amendment Effective Date, reimbursement or
payment of all out-of-pocket expenses (including fees, charges and disbursements
of counsel) required to be reimbursed or paid by any Loan Party hereunder or
under the Credit Agreement or any other Loan Document.

The Administrative Agent shall notify the Borrower and the Lenders of the
Amendment Effective Date, and such notice shall be conclusive and binding.

         SECTION 4. Effect of Amendment. (a) Except as expressly set forth
herein, this Amendment shall not by implication or otherwise limit, impair,
constitute a waiver of or otherwise affect the rights and remedies of the
Lenders, the Administrative Agent or the Collateral Agent under the Credit
Agreement or any other Loan Document, and shall not alter, modify, amend or in
any way affect any of the terms, conditions, obligations, covenants or
agreements contained in the Credit Agreement or any other provision of the
Credit Agreement or of any other Loan Document, all of which are ratified and
affirmed in all respects and shall continue in full force and effect. Nothing
herein shall be deemed to entitle the Borrower to a consent to, or a waiver,
amendment, modification or other change of, any of the terms, conditions,
obligations, covenants or agreements contained in the Credit Agreement or any
other Loan Document in similar or different circumstances.

         (b) On and after the Amendment Effective Date, each reference in the
Credit Agreement to "this Agreement", "hereunder", "hereof", "herein", or words
of like import, and each reference to the Credit Agreement in any Loan Document
shall be deemed a reference to the Credit Agreement as amended hereby. This
Amendment shall constitute a "Loan Document" for all purposes of the Credit
Agreement and the other Loan Documents.

         SECTION 5. Costs and Expenses. The Borrower agrees to reimburse the
Administrative Agent for its reasonable out of pocket expenses in connection
with this Amendment, including the reasonable fees, charges and disbursements of
counsel for the Administrative Agent.

         SECTION 6. Indemnity. It is agreed that for all purposes of Section
9.03(b) of the Credit Agreement, the execution, delivery and performance of this
Amendment and the other transactions contemplated hereby shall all be deemed to
be transactions contemplated by the Credit Agreement.

         SECTION 7. Uniform Commercial Code Filings. The Borrower authorizes the
Collateral Agent at any time and from time to time to file in any relevant

<PAGE>
                                                                               4

jurisdiction financing statements and amendments thereto describing the
Collateral pledged by the Borrower under the Collateral Agreement as "all
assets", "all personal property" or in any other manner deemed appropriate by
the Collateral Agent, and the Borrower hereby confirms and ratifies the filing
by the Collateral Agent prior to the date hereof of any financing statements
containing such a description.

         SECTION 8. Counterparts. 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.
Delivery of any executed counterpart of a signature page of this Amendment by
facsimile transmission shall be as effective as delivery of a manually executed
counterpart hereof.

         SECTION 9. Applicable Law. THIS AMENDMENT SHALL BE CONSTRUED IN
ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE STATE OF NEW YORK.

         SECTION 10. Headings. The headings of this Amendment are for purposes
of reference only and shall not limit or otherwise affect the meaning hereof.

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed by their duly authorized officers, all as of the date and year
first above written.

                                        LAND O'LAKES, INC.,

                                          By
                                             -----------------------------------
                                             Name:
                                             Title:

                                        JPMORGAN CHASE BANK, N.A.,
                                        individually and as Administrative Agent

                                          By
                                             -----------------------------------
                                             Name:
                                             Title:

<PAGE>

                                                               SIGNATURE PAGE TO
                                                          FIFTH AMENDMENT TO THE
                                                   LAND O'LAKES CREDIT AGREEMENT
                                        DATED AS OF OCTOBER 11, 2001, AS AMENDED

To approve Fifth Amendment:

Name of Institution:

   -------------------------------

by
   -------------------------------
   Name:
   Title:<PAGE>
                                                                     EXHIBIT 4.2

                                                               EXECUTION VERSION

                           SIXTH AMENDMENT dated as of June 15, 2005 (this
                  "Amendment"), to the AMENDED AND RESTATED FIVE-YEAR CREDIT
                  AGREEMENT dated as of October 11, 2001 (as amended,
                  supplemented or otherwise modified from time to time, the
                  "Credit Agreement"), among LAND O'LAKES, INC., a cooperative
                  corporation organized under the laws of the State of Minnesota
                  (the "Borrower"), the several banks and other financial
                  institutions and entities from time to time party thereto (the
                  "Lenders"), and JPMORGAN CHASE BANK, N.A., as administrative
                  agent (in such capacity, the "Administrative Agent") and
                  AMENDMENT NO. 2 dated as of June 15, 2005 to the GUARANTEE AND
                  COLLATERAL AGREEMENT dated as of October 11, 2001 (as amended,
                  supplemented or otherwise modified from time to time, the
                  "Collateral Agreement") among the Borrower, the Subsidiaries
                  named therein and JPMorgan Chase Bank, N.A., as collateral
                  agent (in such capacity, the "Collateral Agent").

         A. Capitalized terms used but not defined herein shall have the
meanings assigned to such terms in the Credit Agreement, as amended hereby.

         B. The Borrower has notified the Administrative Agent that it intends
to contribute up to $88,000,000 to Cheese & Protein International LLC ("CPI"), a
Delaware limited liability company and a subsidiary of the Borrower of which, on
the date hereof, the Borrower owns approximately 97.5% of the Equity Interests,
in order to permit CPI to prepay all amounts outstanding under the CPI Lease (as
defined herein) (the foregoing transactions being referred to herein as the "CPI
Lease Transactions"). The Borrower has proposed that, in connection with the CPI
Lease Transactions, CPI will become a Restricted Subsidiary and a Subsidiary
Loan Party and will satisfy the Collateral and Guarantee Requirement.

         C. The Borrower has requested that the Lenders amend certain provisions
of the Credit Agreement in connection with the CPI Lease Transactions as set
forth herein.

         D. The Required Lenders are willing to effect such amendments on the
terms and subject to the conditions of this Amendment.

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

         SECTION 1. Amendment of the Credit Agreement. Effective as of the
Amendment Effective Date:

<PAGE>

                                                                               2

         (a) Section 1.01 of the Credit Agreement is amended by deleting the
definition of "Restricted Subsidiaries" and replacing it with the following:

         'Restricted Subsidiaries' means (i) Land O'Lakes Purina Feed LLC, (ii)
    each existing and subsequently acquired or organized domestic and foreign
    direct or indirect Wholly Owned Subsidiary of the Borrower, Land O'Lakes
    Purina Feed LLC or PMI, and (iii) CPI.

         (b) Section 1.01 of the Credit Agreement is amended to add definitions
of the following terms in appropriate alphabetical order:

         'CPI' means Cheese & Protein International LLC, a Delaware limited
    liability company and a Subsidiary of the Borrower.

         'CPI Contribution' means the contribution by the Borrower to CPI of up
    to $88,000,000 on or prior to July 1, 2005 in order to permit CPI to prepay
    all amounts outstanding under the CPI Lease.

         'CPI Lease' means the lease dated June 2, 2000, as heretofore amended,
    by and between CPI, as Lessee and U.S. Bank, National Association (as
    successor to State Street Bank and Trust Company of California, National
    Association) not in its individual capacity, but solely as Certificate
    Trustee under the Trust Agreement dated as of June 2, 2000, as Lessor.

         'CPI Lease Transactions' means the consummation of the CPI Contribution
    and the prepayment by CPI on July 1, 2005 of all amounts outstanding under
    the CPI Lease.

         'Pollution Control Bonds' means the $10,000,000 California Pollution
    Control Financing Authority Tax-Exempt Variable Rate Demand Solid Waste
    Disposal Revenue Bonds (Cheese & Protein International LLC Project), Series
    2001A issued on April 11, 2001 pursuant to the Trust Indenture between the
    California Pollution Control Financing Authority, as Issuer, and Wells Fargo
    Bank Minnesota, N.A., as Trustee, and the related promissory note issued by
    CPI and held by the California Pollution Control Financing Authority.

         'Sixth Amendment' means the Sixth Amendment, dated as of June 15, 2005,
    to this Agreement.

         'Sixth Amendment Effective Date' means the date on which the Sixth
    Amendment became effective in accordance with Section 4 thereof.

         (c) Amendment of Subsection 6.01(a)(iv). Subsection 6.01(a)(iv) of the
Credit Agreement is amended to read in its entirety as follows:

         "(iv) the Capital Securities in an aggregate amount not in excess of
    $200,000,000 at any time outstanding and the Pollution Control Bonds in an
    aggregate amount not in excess of $10,000,000 at any time outstanding;"

<PAGE>
                                                                               3

         (d) Amendment of Section 6.04. Section 6.04 is amended by (i) deleting
the reference in paragraph (e) to "clause (m)" and replacing it with "clause
(n)", (ii) deleting the reference in paragraph (f) to "clause (m)" and replacing
it with "clause (n)", (iii) deleting the word "and" at the end of paragraph (l),
(iv) inserting a new paragraph (m) that reads in its entirety as follows:

         "(m) the CPI Contribution; and"

and (v) lettering existing paragraph (m) as paragraph (n).

         (e) Amendment of Subsection 6.08(b). Subsection 6.08(b) is amended by
(i) deleting the word "and" at the end of clause (v), (ii) deleting the period
at the end of clause (vi) and replacing it with "; and" and (iii) inserting a
new clause (vii) that reads in its entirety as follows:

         "(vii) prepayments by CPI on July 1, 2005 of all amounts outstanding
    under the CPI Lease.".

         SECTION 2. Amendment of the Collateral Agreement. Effective as of the
Amendment Effective Date,

         (a) Section 1.01 of the Collateral Agreement is amended by deleting the
definition of "Equipment" and replacing it with the following:

         'Equipment' means all Equipment (as defined in the New York UCC).

         (b) The heading of Section 3.02 of the Collateral Agreement is amended
to read as "Delivery of the Pledged Collateral; Certification of Limited
Liability Company and Limited Partnership Interests."

         (c) Section 3.02 of the Collateral Agreement is amended by adding a new
paragraph (d) that reads in its entirety as follows:

         " (d) Each interest in any unlimited liability company, limited
         liability company or limited partnership required to be pledged
         hereunder shall be represented by a certificate, shall be a "security"
         within the meaning of Article 8 of the New York UCC and shall be
         governed by Article 8 of the New York UCC and shall bear a legend to
         such effect that shall be satisfactory to the Collateral Agent. The
         organizational document of each unlimited liability company, limited
         liability company or limited partnership controlled by any Pledgor and
         pledged hereunder shall contain a provision whereby it elects that all
         interests in such entity are securities governed by Article 8 and
         references such legend and that no change to such provision shall be
         effective until outstanding certificates are surrendered and new
         certificates bearing such legend are issued. The foregoing provisions
         shall not apply to any unlimited liability company, limited liability
         company or limited partnership that is not a Wholly Owned Subsidiary to
         the extent that the terms of the organizational

<PAGE>
                                                                               4

         documents of such entities would require the consents of Persons other
         than Loan Parties for such pledge (other than CPI, if and to the extent
         that, the consent of any such Person is necessary). "

         SECTION 3. Representations and Warranties. To induce the other parties
hereto to enter into this Amendment, the Borrower represents and warrants to
each of the Lenders, the Administrative Agent and the Collateral Agent that, as
of the Amendment Effective Date:

         (a) This Amendment has been duly authorized, executed and delivered by
it and this Amendment and the Credit Agreement, as amended hereby, constitutes
its legal, valid and binding obligation, enforceable against it in accordance
with its terms except as such enforceability may be limited by bankruptcy,
insolvency, reorganization, moratorium or other similar laws affecting
creditors' rights generally and by general principles of equity (regardless of
whether such enforceability is considered in a proceeding at law or in equity).

         (b) The representations and warranties set forth in Article III of the
Credit Agreement are, after giving effect to this Amendment, true and correct in
all material respects on and as of the Amendment Effective Date with the same
effect as though made on and as of the Amendment Effective Date, except to the
extent such representations and warranties expressly relate to an earlier date
(in which case they were true and correct in all material respects as of such
earlier date).

         (c) No Default or Event of Default has occurred and is continuing.

         (d) After giving effect to this Amendment, the Collateral and Guarantee
Requirement has been satisfied.

         SECTION 4. Effectiveness. This Amendment and the amendment of the
Credit Agreement effected hereby shall become effective as of the first date
(the "Amendment Effective Date") on which the following conditions have been
satisfied:

         (a) The Administrative Agent (or its counsel) shall have received duly
executed counterparts hereof that, when taken together, bear the signatures of
(i) the Administrative Agent, (ii) the Borrower and (iii) the Required Lenders.

         (b) The Administrative Agent shall have received a certificate of a
Financial Officer to the effect that the representations and warranties set
forth in Section 3 hereof are true and correct on and as of the Amendment
Effective Date.

         (c) The Administrative Agent shall have received a favorable opinion of
counsel to the Borrower and the Subsidiary Loan Parties, addressed to the
Administrative Agent and the Lenders and dated the Amendment Effective Date,
covering such matters relating to this Amendment, the Credit Agreement, as
amended hereby, and the other Loan Documents and the security interests
thereunder, and the satisfaction by CPI of the Collateral and Guarantee
Requirement as the Administrative Agent shall reasonably

<PAGE>
                                                                               5

request, and such opinion of counsel shall be reasonably satisfactory to the
Administrative Agent.

         (d) The Administrative Agent shall have received such documents and
certificates as the Administrative Agent or its counsel may reasonably request
relating to the organization, existence and good standing of each Loan Party,
the authorization of this Amendment and the transactions contemplated hereby
(including the satisfaction by CPI of the Collateral and Guarantee Requirement)
and any other legal matters relating to the Loan Parties, this Amendment, the
other Loan Documents and the transactions contemplated hereby, all in form and
substance reasonably satisfactory to the Administrative Agent.

         (e) At or prior to the time that the CPI Contribution is made, the
Collateral and Guarantee Requirement shall have been satisfied by CPI and with
respect to all Equity Interests of CPI owned by Loan Parties.

         (f) The Administrative Agent shall have received all fees and other
amounts due from any Loan Party hereunder or under the Credit Agreement or any
other Loan Document on or prior to the Amendment Effective Date and, to the
extent invoiced on or prior to the Amendment Effective Date, reimbursement or
payment of all out-of-pocket expenses (including fees, charges and disbursements
of counsel) required to be reimbursed or paid by any Loan Party hereunder or
under the Credit Agreement or any other Loan Document.

The Administrative Agent shall notify the Borrower and the Lenders of the
Amendment Effective Date, and such notice shall be conclusive and binding.

         SECTION 5. Effect of Amendment. (a) Except as expressly set forth
herein, this Amendment shall not by implication or otherwise limit, impair,
constitute a waiver of or otherwise affect the rights and remedies of the
Lenders, the Administrative Agent or the Collateral Agent under the Credit
Agreement or any other Loan Document, and shall not alter, modify, amend or in
any way affect any of the terms, conditions, obligations, covenants or
agreements contained in the Credit Agreement or any other provision of the
Credit Agreement or of any other Loan Document, all of which are ratified and
affirmed in all respects and shall continue in full force and effect. Nothing
herein shall be deemed to entitle the Borrower to a consent to, or a waiver,
amendment, modification or other change of, any of the terms, conditions,
obligations, covenants or agreements contained in the Credit Agreement or any
other Loan Document in similar or different circumstances.

         (b) On and after the Amendment Effective Date, each reference in the
Credit Agreement to "this Agreement", "hereunder", "hereof", "herein", or words
of like import, and each reference to the Credit Agreement in any Loan Document
shall be deemed a reference to the Credit Agreement as amended hereby. This
Amendment shall constitute a "Loan Document" for all purposes of the Credit
Agreement and the other Loan Documents.

<PAGE>
                                                                               6

         SECTION 6. Costs and Expenses. The Borrower agrees to reimburse the
Administrative Agent for its reasonable out of pocket expenses in connection
with this Amendment, including the reasonable fees, charges and disbursements of
counsel for the Administrative Agent.

         SECTION 7. Indemnity. It is agreed that for all purposes of Section
9.03(b) of the Credit Agreement, the execution, delivery and performance of this
Amendment and the other transactions contemplated hereby shall all be deemed to
be transactions contemplated by the Credit Agreement.

         SECTION 8. Uniform Commercial Code Filings. The Borrower authorizes the
Collateral Agent at any time and from time to time to file in any relevant
jurisdiction financing statements and amendments thereto describing the
Collateral pledged by the Borrower or any other Loan Party under the Collateral
Agreement as "all assets", "all personal property" or in any other manner deemed
appropriate by the Collateral Agent, and the Borrower hereby confirms and
ratifies the filing by the Collateral Agent prior to the date hereof of any
financing statements containing such a description.

         SECTION 9. Counterparts. 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.
Delivery of any executed counterpart of a signature page of this Amendment by
facsimile transmission shall be as effective as delivery of a manually executed
counterpart hereof.

         SECTION 10. Applicable Law. THIS AMENDMENT SHALL BE CONSTRUED IN
ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE STATE OF NEW YORK.

         SECTION 11. Headings. The headings of this Amendment are for purposes
of reference only and shall not limit or otherwise affect the meaning hereof.

<PAGE>
         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed by their duly authorized officers, all as of the date and year
first above written.

                                    LAND O'LAKES, INC.,

                                       By
                                          --------------------------------------
                                          Name:
                                          Title:

                                    JPMORGAN CHASE BANK, N.A.,
                                    individually, as Administrative Agent, and
                                    as Collateral Agent,

                                       By
                                          --------------------------------------
                                          Name:
                                          Title:

<PAGE>

                                                               SIGNATURE PAGE TO
                                                          SIXTH AMENDMENT TO THE
                                                   LAND O'LAKES CREDIT AGREEMENT
                                        DATED AS OF OCTOBER 11, 2001, AS AMENDED

To approve Sixth Amendment to the
Credit Agreement and Amendment to
the Collateral Agreement:

Name of Institution:

  -----------------------------------

by
  -----------------------------------
  Name:
  Title:

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