Document:

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                                                                Exhibit 10.8

                               PETOPIA.COM, INC.

                          PROPRIETARY INFORMATION AND
                  INVENTION ASSIGNMENT/LICENSE-BACK AGREEMENT

          As a condition of my becoming employed (or my employment being
continued) or my being retained as a consultant (or my consulting relationship
being continued) by Petopia.com, Inc., a Delaware corporation, or any of its
current or future subsidiaries, affiliates, successors or assigns (collectively,
the "Company"), and in consideration of my employment or consulting relationship
     -------
with the Company and my receipt of the compensation now and hereafter paid to me
by the Company, I, Prem Urali, agree to the following:

          1.  Employment or Consulting Relationship.  I understand and
              -------------------------------------
acknowledge that this Agreement does not alter, amend or expand upon any rights
I may have to continue in the employ of or in a consulting relationship with, or
the duration of my employment or consulting relationship with, the Company under
any existing agreements between the Company and me or under applicable law.  Any
employment and/or consulting relationship between the Company and me, whether
commenced prior to or upon the date of this Agreement, shall be referred to
herein as the "Relationship."
               ------------

          2.  At Will Employment.  I understand and acknowledge that my
              ------------------
Relationship with the Company is and shall continue to be at will, as defined
under applicable law, meaning that either I or the Company may terminate the
Relationship at any time for any reason or no reason, without further obligation
or liability.

          3.  Proprietary Information.
              -----------------------

              (a) Company Information.  I agree at all times during the term of
                  -------------------
the Relationship and thereafter, to hold in strictest confidence, and not to
use, except for the benefit of the Company and within the scope of my
Relationship, or to disclose to any person, firm or corporation without written
authorization of the President of the Company, any Proprietary Information of
the Company that I obtain or create. I further agree not to make copies of such
Proprietary Information except as authorized by the Company. I understand that
"Proprietary Information" means any Company proprietary information, technical
 -----------------------
data, trade secrets or know-how, including, but not limited to, research,
product plans, products, services, suppliers, customer lists and customers
(including, but not limited to, customers of the Company on whom I called or
with whom I became acquainted during the Relationship), prices and costs,
markets, software, developments, inventions, processes, formulas, technology,
designs, drawings, engineering, hardware configuration information, marketing,
licenses, finances, budgets or other business information disclosed to me by the
Company either directly or indirectly in writing, orally or by drawings or
observation of parts or equipment or created by me during the period of the
Relationship, whether or not during working hours. I understand that
"Proprietary Information" includes, but is not limited to, information
 -----------------------
pertaining to any aspects of the Company's business which is either information
not known by actual or potential competitors of
<PAGE>

the Company or is proprietary information of the Company or its customers or
suppliers, whether of a technical nature or otherwise. I further understand that
Proprietary Information does not include any of the foregoing items which has
become publicly known and made generally available through no wrongful act of
mine or of others who were under confidentiality obligations as to the item or
items involved.

          (b) Former Employer Information.  I represent that my performance of
              ---------------------------
all terms of this Agreement as an employee or consultant of the Company have not
breached and will not breach any agreement to keep in confidence proprietary
information, knowledge or data acquired by me in confidence or trust prior or
subsequent to the commencement of the Relationship, and I will not use in the
course of the Relationship, disclose to the Company, or induce the Company to
use, any inventions, confidential or proprietary information or material
belonging to any previous employer or any other party.

          (c) Third Party Information.  I recognize that the Company has
              -----------------------
received and in the future will receive from third parties their confidential or
proprietary information subject to a duty on the Company's part to maintain the
confidentiality of such information and to use it only for certain limited
purposes.  I agree to hold all such confidential or proprietary information in
the strictest confidence and not to disclose it to any person, firm or
corporation or to use it except as necessary in carrying out my work for the
Company in a manner consistent with the Company's agreement with such third
party.

          4.  Inventions.
              ----------

              (a) Inventions Retained and Licensed.  I have attached hereto, as
                  --------------------------------
Exhibit A, a list describing all inventions, original works of authorship,
---------
developments, improvements, and trade secrets that were made by me prior to the
Relationship (collectively referred to as "Prior Inventions"), which belong to
                                           ----------------
me, which relate to the Company's proposed or current business, products or
research and development, and which are not assigned to the Company hereunder;
or, if no such list is attached, I represent that there are no such Prior
Inventions.  If in the course of the Relationship, I incorporate into a Company
product, process or machine a Prior Invention owned by me or in which I have an
interest, the Company is hereby granted and shall have a non-exclusive, royalty-
free, irrevocable, perpetual, worldwide license (with the right to sublicense)
to make, have made, copy, modify, make derivative works of, use, sell and
otherwise distribute such Prior Invention as part of or in connection with such
product, process or machine.

              (b) Assignment of Inventions.  I agree that I will promptly make
                  ------------------------
full written disclosure to the Company, will hold in trust for the sole right
and benefit of the Company, and hereby assign, and agree to assign, to the
Company, or its designee, all my right, title and interest throughout the world
in and to any and all inventions, original works of authorship, developments,
concepts, know-how, improvements or trade secrets, whether or not patentable or
registrable under copyright or similar laws, that I may solely or jointly
conceive or develop or reduce to practice, or cause to be conceived or developed
or reduced to practice, during the period of time of the Relationship
(collectively referred to as "Inventions"), except as provided in Section 4(e)
                              ----------
below. I further acknowledge that all inventions, original works of authorship,

                                      -2-
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developments, concepts, know-how, improvements or trade secrets which are made
by me (solely or jointly with others) within the scope of and during the period
of the Relationship are "works made for hire" (to the greatest extent permitted
                         -------------------
by applicable law) and are compensated by my salary, during any period as an
employee, or by such amounts paid to me under any applicable consulting
agreement or consulting arrangements, during any period as a consultant, unless
regulated otherwise by mandatory law.

          (c) Maintenance of Records.  I agree to keep and maintain adequate and
              ----------------------
current written records of all Inventions made by me (solely or jointly with
others) during the term of the Relationship.  The records may be in the form of
notes, sketches, drawings, flow charts, electronic data or recordings,
laboratory notebooks, and any other format.  The records will be available to
and remain the sole property of the Company at all times.  I agree not to remove
such records from the Company's place of business except as expressly permitted
by Company policy which may, from time to time, be revised at the sole election
of the Company.

          (d) Patent and Copyright Registrations.  I agree to assist the
              ----------------------------------
Company, or its designee, at the Company's expense, in every proper way to
secure the Company's rights in the Inventions and any copyrights, patents,
trademarks, mask work rights, moral rights, or other intellectual property
rights relating thereto in any and all countries, including the disclosure to
the Company of all pertinent information and data with respect thereto, the
execution of all applications, specifications, oaths, assignments and all other
instruments which the Company shall deem necessary in order to apply for, obtain
maintain and transfer such rights and in order to assign and convey to the
Company, its successors, assigns and nominees the sole and exclusive rights,
title and interest in and to such Inventions, and any copyrights, patents, mask
work rights or other intellectual property rights relating thereto.  I further
agree that my obligation to execute or cause to be executed, when it is in my
power to do so, any such instrument or papers shall continue after the
termination of this Agreement.  If the Company is unable because of my mental or
physical incapacity or unavailability or for any other reason to secure my
signature to apply for or to pursue any application for any United States or
foreign patents or copyright registrations covering Inventions or original works
of authorship assigned to the Company as above, then I hereby irrevocably
designate and appoint the Company and its duly authorized officers and agents as
my agent and attorney in fact, to act for and in my behalf and stead to execute
and file any such applications and to do all other lawfully permitted acts to
further the application for, prosecution, issuance, maintenance or transfer of
letters patent or copyright registrations thereon with the same legal force and
effect as if executed by me.  I hereby waive and irrevocably quitclaim to the
Company any and all claims, of any nature whatsoever, which I now or hereafter
have for infringement of any and all proprietary rights assigned to the Company.

          (e) Exception to Assignments.  I understand that the provisions of
              ------------------------
this Agreement requiring assignment of Inventions to the Company do not apply to
any invention which qualifies fully under the provisions of California Labor
Code Section 2870 (attached hereto as Exhibit B).  I will advise the Company
                                      ---------
promptly in writing of any inventions that I believe meet such provisions and
that are not disclosed on Exhibit A.
                          ---------

                                      -3-
<PAGE>

          5.  Limited License.  The Company hereby grants me a non-exclusive,
              ---------------
royalty-free, worldwide license (with the right to sublicense in accordance with
the restrictions set forth herein) to make, have made, copy, modify, make
derivative works of and use the Inventions conceived or reduced to practice
solely by me (the "License"); provided, however, that I shall not use,
                   -------
sublicense or allow to be sublicensed (either directly or through multiple
tiers) the License in any manner, either directly or indirectly, for the benefit
of or to any third party which is a competitor of the Company, as determined by
the Company in its sole discretion; and provided, further, that any sublicense
shall be bound by the same restrictions set forth herein.  Any use or sublicense
of the License in violation of the foregoing shall result in immediate
termination of the License.

          6.  Returning Company Documents.  I agree that, at the time of
              ---------------------------
termination of the Relationship, I will deliver to the Company (and will not
keep in my possession, recreate or deliver to anyone else) any and all devices,
records, data, notes, reports, proposals, lists, correspondence, specifications,
drawings, blueprints, sketches, laboratory notebooks, materials, flow charts,
equipment, other documents or property, or reproductions of any aforementioned
items developed by me pursuant to the Relationship or otherwise belonging to the
Company, its successors or assigns.  I further agree that to any property
situated on the Company's premises and owned by the Company, including disks and
other storage media, filing cabinets or other work areas, is subject to
inspection by Company personnel at any time with or without notice.  In the
event of the termination of the Relationship, I agree to sign and deliver the
"Termination Certificate" attached hereto as Exhibit C.
 -----------------------                     ---------

          7.  Notification to Other Parties.
              -----------------------------

              (a) Employees.  In the event that I leave the employ of the
                  ---------
Company, I hereby consent to notification by the Company to my new employer
about my rights and obligations under this Agreement.

              (b) Consultants.  I hereby grant consent to notification by the
                  -----------
Company to any other parties besides the Company with whom I maintain a
consulting relationship, including parties with whom such relationship commences
after the effective date of this Agreement, about my rights and obligations
under this Agreement.

          8.  Solicitation of Employees, Consultants and Other Parties.  I agree
              --------------------------------------------------------
that during the term of the Relationship, and for a period of twenty-four (24)
months immediately following the termination of the Relationship for any reason,
whether with or without cause, I shall not either directly or indirectly
solicit, induce, recruit or encourage any of the Company's employees or
consultants to terminate their relationship with the Company, or take away such
employees or consultants, or attempt to solicit, induce, recruit, encourage or
take away employees or consultants of the Company, either for myself or for any
other person or entity.  Further, for a period of twenty-four (24) months
following termination of the Relationship for any reason, with or without cause,
I shall not solicit any licensor to or customer of the Company or licensee of
the Company's products, in each case, that are known to me, with respect to any
business, products

                                      -4-
<PAGE>

or services that are competitive to the products or services offered by the
Company or under development as of the date of termination of the Relationship.

          9.  Representations and Covenants.
              -----------------------------

              (a) Facilitation of Agreement.  I agree to execute promptly any
                  -------------------------
proper oath or verify any proper document required to carry out the terms of
this Agreement upon the Company's written request to do so.

              (b) Conflicts.  I represent that my performance of all the terms
                  ---------
of this Agreement will not breach any agreement to keep in confidence
proprietary information acquired by me in confidence or in trust prior to
commencement of the Relationship. I have not entered into, and I agree I will
not enter into, any oral or written agreement in conflict with any of the
provisions of this Agreement.

              (c) Voluntary Execution.  I certify and acknowledge that I have
                  -------------------
carefully read all of the provisions of this Agreement and that I understand and
will fully and faithfully comply with such provisions.

          10. General Provisions.
              ------------------

              (a) Governing Law.  The validity, interpretation, construction and
                  -------------
performance of this Agreement shall be governed by the laws of the State of
California, without giving effect to the principles of conflict of laws.

              (b) Entire Agreement.  This Agreement sets forth the entire
                  ----------------
agreement and understanding between the Company and me relating to the subject
matter herein and merges all prior discussions between us. No modification or
amendment to this Agreement, nor any waiver of any rights under this Agreement,
will be effective unless in writing signed by the party to be charged. Any
subsequent change or changes in my duties, obligations, rights or compensation
will not affect the validity or scope of this Agreement.

              (c) Severability.  If one or more of the provisions in this
                  ------------
Agreement are deemed void by law, then the remaining provisions will continue in
full force and effect.

              (d) Successors and Assigns.  This Agreement will be binding upon
                  ----------------------
my heirs, executors, administrators and other legal representatives and will be
for the benefit of the Company, its successors, and its assigns.

              (e) Survival.  The provisions of this Agreement shall survive the
                  --------
termination of the Relationship and the assignment of this Agreement by the
Company to any successor in interest or other assignee.

              (f) ADVICE OF COUNSEL.  I ACKNOWLEDGE THAT, IN EXECUTING THIS
                  -----------------
AGREEMENT, I HAVE HAD THE OPPORTUNITY TO SEEK THE ADVICE OF LEGAL COUNSEL, AND I
HAVE READ AND UNDERSTOOD ALL OF THE

                                      -5-
<PAGE>

TERMS AND PROVISIONS OF THIS AGREEMENT. THIS AGREEMENT SHALL NOT BE CONSTRUED
AGAINST ANY PARTY BY REASON OF THE DRAFTING OR PREPARATION HEREOF.

          The parties have executed this Agreement on the respective dates set
forth below:

COMPANY:

PETOPIA.COM, INC.                       PREM URALI, an Individual:

By:_________________________________    _________________________________
                                        Signature

Title:______________________________

Date:_______________________________    Date:____________________________

Address:                                Address:

357 Tehema Street                       Street:__________________________
San Francisco, California  94103               __________________________

                                      -6-<PAGE>

                                                                    EXHIBIT 10.9

                      RESTRICTED STOCK PURCHASE AGREEMENT

          This Restricted Stock Purchase Agreement (the "Agreement") is made as
                                                         ---------
of April 15, 1999 (the "Purchase Date"), by and between Petopia.com, Inc., a
Delaware corporation (the "Company"), and ANDREA C. REISMAN ("Purchaser").
                           -------                            ---------

                              W I T N E S S E T H

          WHEREAS, the Purchaser is a founder of the Company and desires to
purchase shares of the Company's common stock as a founder; and

          WHEREAS, the Purchaser possesses certain personal and intellectual
property listed on Attachment A to the Bill of Sale attached hereto as Exhibit A
                   ------------                                        ---------
(the "Assets"), which Purchaser intends to assign to the Company as
      ------
consideration for the shares purchased hereunder, and which assignment shall be
made pursuant to the Technology Transfer Agreement dated as of even date hereof
between Purchaser and the Company and attached hereto as Exhibit B;
                                                         ---------

          NOW, THEREFORE, in consideration for the mutual promises and covenants
set forth herein, the parties agree as follows:

          1.  Sale of Stock.  Subject to the terms and conditions of this
              -------------
Agreement, on the Purchase Date (as defined below) the Company will issue and
sell to Purchaser, and Purchaser agrees to purchase from the Company,  two
million, two hundred eighty-eight thousand, eight hundred thirteen (2,288,813)
Shares (as defined below) in exchange for the entirety of the Purchaser's right,
title and interest in the Assets.  The Company and the Purchaser agree that the
fair market value of such consideration equals $178,527.41, or $.078 per
purchased Share.

          The term "Shares" refers to the Shares and all securities received in
replacement of or in connection with the Shares pursuant to stock dividends or
splits, all securities received in replacement of the Shares in a
recapitalization, merger, reorganization, exchange or the like, and all new,
substituted or additional securities or other properties to which Purchaser is
entitled by reason of Purchaser's ownership of the Shares.

          2.  Purchase.  The purchase and sale of the Shares under this
              --------
Agreement shall occur at the principal office of the Company simultaneously with
the execution of this Agreement or at such other time and place as the Company
and Purchaser shall agree (the "Purchase Date").  On the Purchase Date, the
                                -------------
Company will deliver to Purchaser a certificate representing the Shares to be
purchased by Purchaser (which shall be issued in Purchaser's name) against
delivery of the Assets.

          3.  Limitations on Transfer.  In addition to any other limitation on
              -----------------------
transfer created by applicable securities laws, Purchaser shall not assign,
encumber or dispose of any interest in the Shares while the Shares are subject
to the Company's Repurchase Option (as defined below), except as provided below.
After any Shares have been released from the Repurchase Option,
<PAGE>

Purchaser shall not assign, encumber or dispose of any interest in such Shares
except in compliance with the provisions below and applicable securities laws.

          (a)  Repurchase Option.
               -----------------

               (i)   In the event of the voluntary or involuntary termination of
Purchaser's employment with the Company for any reason (including death or
disability), with or without cause, the Company shall upon the date of such
termination (the "Termination Date") have an irrevocable, exclusive option (the
                  ----------------
"Repurchase Option") for a period of 60 days from such date to repurchase all or
 -----------------
any portion of the Shares held by Purchaser as of the Termination Date which
have not yet been released from the Company's Repurchase Option at the original
purchase price per Share specified in Section 1 (adjusted for any stock splits,
stock dividends and the like); provided, however, that the Repurchase Option
                               --------  -------
shall continue for a period of up to one year from the Termination Date to the
extent that the Company reasonably determines that such an extension of time is
necessary to prevent the repurchase of Purchaser's Shares from causing other
capital stock of the Company to not qualify as "small business stock" under
Section 1202 of the Internal Revenue Code of 1986, as amended.

               (ii)  The Repurchase Option shall be exercised by the Company by
written notice to Purchaser or Purchaser's executor and, at the Company's
option, (A) by delivery to Purchaser or Purchaser's executor with such notice of
a check in the amount of the purchase price for the Shares being purchased, or
(B) in the event Purchaser is indebted to the Company, by cancellation by the
Company of an amount of such indebtedness equal to the purchase price for the
Shares being repurchased, or (C) by a combination of (A) and (B) so that the
combined payment and cancellation of indebtedness equals such purchase price.
Upon delivery of such notice and payment of the purchase price in any of the
ways described above, the Company shall become the legal and beneficial owner of
the Shares being repurchased and all rights and interest therein or related
thereto, and the Company shall have the right to transfer to its own name the
number of Shares being repurchased by the Company, without further action by
Purchaser.

               (iii) Subject to Section 3(a)(iv) below, the Repurchase Option
shall be in effect with respect to 60% of the Shares as of the Purchase Date,
with 40% of the Shares not being subject to the Repurchase Option as of the
Purchase Date. The Repurchase Option as to the remaining 60% of the Shares shall
lapse as to 1/36 of such remaining shares on each monthly anniversary of the
closing date of the sale of at least $4,000,000 of the Company's Series A
Preferred Stock (the "Vesting Commencement Date"), until all Shares are released
from the Repurchase Option (provided in each case that Purchaser's employment
with the Company has not been terminated prior to the date of any such release).
Fractional shares shall be rounded to the nearest whole share. Shares as to
which the Repurchase Option has not lapsed are referred to as "Unvested Shares."
                                                               ---------------

               (iv)  For purposes hereunder, a "Merger" shall mean the
completion of a merger or consolidation of the Company in which the Company is
not the survivor or in which greater than 50% of the voting power of the Company
is transferred, or a sale of all or substantially all of the Company's assets or
capital stock, excluding a transaction for the sole

                                      -2-
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purpose of changing the legal domicile of the Company. In the event that
Purchaser's employment with the Company (or its successor entity) is terminated
without Cause (defined below) or as a result of a Constructive Termination
(defined below) at any time after the consummation of a Merger, the Repurchase
Option shall immediately lapse as to any remaining Unvested Shares. Upon
termination of the repurchase rights described in Section 3(a)(i) a new
certificate or certificates representing the Shares not repurchased shall be
issued, on request, without the legend referred to in Section 6(a)(ii) below and
delivered to Purchaser.

               (v)   For purposes of this Agreement, "Cause" for the termination
                                                      -----
of Purchaser's employment with the Company or its successor will exist at any
time after the happening of one or more of the following events: (1) Purchaser's
willful misconduct or material failure in the performance of the duties of his
position with the Company or its successor, including Purchaser's failure to
comply in any material respect with the legal directives of the Company's Chief
Executive Officer or the Board of Directors so long as such directives are not
unreasonably inconsistent with the Purchaser's position and duties, and such
refusal to comply is not remedied within 10 days after receiving written notice
from the Company or its successor, which written notice shall state that failure
to remedy such conduct may result in termination for Cause; or (2) conduct that
materially adversely affects the Company or its successor or is materially
detrimental to the reputation of the Founder or of the Company or its successor,
including but not limited to conviction of a felony involving moral turpitude.

               (vi)  For purposes of this Agreement, "Constructive Termination"
                                                      ------------------------
shall be deemed to occur if (1) there is an adverse change in Purchaser's
position with the Company or its successor causing such position to be of
materially reduced stature or responsibility; (2) a reduction of more than 25%
of Purchaser's base compensation, or (3) Purchaser's refusal to relocate to a
facility or location that is more than fifty (50) miles from Petopia.com, Inc.'s
principal place of business unless such location is within fifty (50) miles from
Founder's residence.

          (b)  Assignment.  The right of the Company to purchase any part of the
               ----------
Shares may be assigned in whole or in part to any stockholder or stockholders of
the Company or other persons or organizations; provided, however, that an
assignee, other than a corporation that is the parent or a 100% owned subsidiary
of the Company, must pay the Company, upon assignment of such right, cash equal
to the difference between the original purchase price and fair market value, if
the original purchase price is less than the fair market value of the Shares
subject to the assignment.

          (c)  Restrictions Binding on Transferees. All transferees of Shares or
               -----------------------------------
any interest therein will receive and hold such Shares or interest subject to
the provisions of this Agreement, including, insofar as applicable, the
Repurchase Option. Any sale or transfer of the Company's Shares shall be void
unless the provisions of this Agreement are met.

          (d)  Termination of Rights.  The right of first refusal granted the
               ---------------------
Company by Section 3(b) above and the option to repurchase the Shares in the
event of an involuntary transfer granted the Company by Section 3(c) above shall
terminate upon the first sale of Common Stock

                                      -3-
<PAGE>

of the Company to the general public pursuant to a registration statement filed
with and declared effective by the Securities and Exchange Commission under the
Securities Act. Upon termination of the right of first refusal described in
Section 3(b) and the expiration or exercise of the Repurchase Option, a new
certificate or certificates representing the Shares not repurchased shall be
issued, on request, without the legend referred to in Section 6(a)(ii) below and
delivered to Purchaser.

          4.  Escrow of Unvested Shares.  For purposes of facilitating the
              -------------------------
enforcement of the provisions of Section 3 above, Purchaser agrees, immediately
upon receipt of the certificate(s) for the Shares subject to the Repurchase
Option, to deliver such certificate(s), together with an Assignment Separate
from Certificate in the form attached to this Agreement as Exhibit C executed by
                                                           ---------
Purchaser and by Purchaser's spouse (if required for transfer), in blank, to the
Secretary of the Company, or the Secretary's designee, to hold such
certificate(s) and Assignment Separate from Certificate in escrow and to take
all such actions and to effectuate all such transfers and/or releases as are in
accordance with the terms of this Agreement.  Purchaser hereby acknowledges that
the Secretary of the Company, or the Secretary's designee, is so appointed as
the escrow holder with the foregoing authorities as a material inducement to
make this Agreement and that said appointment is coupled with an interest and is
accordingly irrevocable.  Purchaser agrees that said escrow holder shall not be
liable to any party hereof (or to any other party).  The escrow holder may rely
upon any letter, notice or other document executed by any signature purported to
be genuine and may resign at any time.  Purchaser agrees that if the Secretary
of the Company, or the Secretary's designee, resigns as escrow holder for any or
no reason, the Board of Directors of the Company shall have the power to appoint
a successor to serve as escrow holder pursuant to the terms of this Agreement.

          5.  Investment and Taxation Representations.  In connection with the
              ---------------------------------------
purchase of the Shares, Purchaser represents to the Company the following:

              (a)  Purchaser is aware of the Company's business affairs and
financial condition and has acquired sufficient information about the Company to
reach an informed and knowledgeable decision to acquire the Shares. Purchaser is
purchasing the Shares for investment for his or her own account only and not
with a view to, or for resale in connection with, any "distribution" thereof
within the meaning of the Securities Act.

              (b)  Purchaser understands that the Shares have not been
registered under the Securities Act by reason of a specific exemption therefrom,
which exemption depends upon, among other things, the bona fide nature of
Purchaser's investment intent as expressed herein.

              (c)  Purchaser further acknowledges and understands that the
Shares must be held indefinitely unless they are subsequently registered under
the Securities Act or an exemption from such registration is available.
Purchaser further acknowledges and understands that the Company is under no
obligation to register the Shares. Purchaser understands that the certificate
evidencing the Shares will be imprinted with a legend which prohibits the
transfer of the Shares unless they are registered or such registration is not
required in the opinion of counsel for the Company.

                                      -4-
<PAGE>

              (d)   Purchaser is familiar with the provisions of Rules 144 and
701, each promulgated under the Securities Act, which, in substance, permit
limited public resale of "restricted securities" acquired, directly or
indirectly, from the issuer thereof (or from an affiliate of such issuer), in a
non-public offering subject to the satisfaction of certain conditions. Rule 701
provides that if the issuer qualifies under Rule 701 at the time of issuance of
the securities, such issuance will be exempt from registration under the
Securities Act. In the event the Company becomes subject to the reporting
requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934 (the
"Exchange Act"), the securities exempt under Rule 701 may be resold by Purchaser
 ------------
90 days thereafter, subject to the satisfaction of certain of the conditions
specified by Rule 144, including, among other things: (1) the sale being made
through a broker in an unsolicited "broker's transaction" or in transactions
directly with a market maker (as said term is defined under the Exchange Act);
and (2) in the case of an affiliate, the availability of certain public
information about the Company, and the amount of securities being sold during
any three month period not exceeding the limitations specified in Rule 144(e),
if applicable. Notwithstanding this Section 5(d), Purchaser acknowledges and
agrees to the restrictions set forth in Section 5(f) hereof.

     In the event that the Company does not qualify under Rule 701 at the time
of purchase, then the Shares may be resold by Purchaser in certain limited
circumstances subject to the provisions of Rule 144, which requires, among other
things: (1) the availability of certain public information about the Company;
(2) the resale occurring not less than one year after the party has purchased,
and made full payment of (within the meaning of Rule 144), the securities to be
sold; and, in the case of an affiliate, or of a non-affiliate who has held the
securities less than two years, (3) the sale being made through a broker in an
unsolicited "broker's transaction" or in transactions directly with a market
maker (as such term is defined under the Exchange Act) and the amount of
securities being sold during any three month period not exceeding the specified
limitations stated therein, if applicable.

              (e)   Purchaser further understands that at the time he or she
wishes to sell the Shares there may be no public market upon which to make such
a sale, and that, even if such a public market then exists, the Company may not
be satisfying the current public information requirements of Rule 144 or 701,
and that, in such event, Purchaser would be precluded from selling the Shares
under Rule 144 or 701 even if the one-year minimum holding period had been
satisfied.

              (f)   Purchaser further understands that in the event all of the
applicable requirements of Rule 144 or 701 are not satisfied, registration under
the Securities Act, compliance with Regulation A, or some other registration
exemption will be required; and that, notwithstanding the fact that Rules 144
and 701 are not exclusive, the Staff of the Securities and Exchange Commission
has expressed its opinion that persons proposing to sell private placement
securities other than in a registered offering and otherwise than pursuant to
Rule 144 or 701 will have a substantial burden of proof in establishing that an
exemption from registration is available for such offers or sales, and that such
persons and their respective brokers who participate in such transactions do so
at their own risk.

                                      -5-
<PAGE>

          (g)   Purchaser understands that Purchaser may suffer adverse tax
consequences as a result of Purchaser's purchase or disposition of the Shares.
Purchaser represents that Purchaser has consulted any tax consultants Purchaser
deems advisable in connection the purchase or disposition of the Shares and that
Purchaser is not relying on the Company for any tax advice.

          (h)   Purchaser holds good and marketable title to the Assets,
free and clear of restrictions on or conditions to transfer or assignment, and
free and clear of liens, pledges, charges, or encumbrances.

          (i)   The execution and delivery of this Agreement by Purchaser,
and the consummation of the contemplated transactions, will not result in the
creation or imposition of any valid lien, charge, or encumbrance on any of the
Assets, and will not require the authorization, consent, or approval of any
third party, including any governmental subdivision or regulatory agency.

     6.   Restrictive Legends and Stop-Transfer Orders.
          --------------------------------------------

          (a)  Legends.  The certificate or certificates representing the Shares
               -------
shall bear the following legends (as well as any legends required by applicable
state and federal corporate and securities laws):

               (i)    THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE
                      NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
                      1933, AND HAVE BEEN ACQUIRED FOR INVESTMENT AND
                      NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE
                      SALE OR DISTRIBUTION THEREOF. NO SUCH SALE OR
                      DISPOSITION MAY BE EFFECTED WITHOUT AN EFFECTIVE
                      REGISTRATION STATEMENT RELATED THERETO OR AN
                      OPINION OF COUNSEL FOR THE COMPANY THAT SUCH
                      REGISTRATION IS NOT REQUIRED UNDER THE
                      SECURITIES ACT OF 1933.

               (ii)   THE SHARES REPRESENTED BY THIS CERTIFICATE MAY
                      BE TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS
                      OF AN AGREEMENT BETWEEN THE COMPANY AND THE
                      STOCKHOLDER, A COPY OF WHICH IS ON FILE WITH THE
                      SECRETARY OF THE COMPANY.

               (iii)  Any legend required to be placed thereon by the California
                      Commissioner of Corporations.

          (b)  Stop-Transfer Notices.  Purchaser agrees that, in order to ensure
               ---------------------
compliance with the restrictions referred to herein, the Company may issue
appropriate "stop

                                      -6-
<PAGE>

transfer" instructions to its transfer agent, if any, and that, if the Company
transfers its own securities, it may make appropriate notations to the same
effect in its own records.

          (c) Refusal to Transfer.  The Company shall not be required (i) to
              -------------------
transfer on its books any Shares that have been sold or otherwise transferred in
violation of any of the provisions of this Agreement or (ii) to treat as owner
of such Shares or to accord the right to vote or pay dividends to any purchaser
or other transferee to whom such Shares shall have been so transferred.

     7.   No Employment Rights.  Nothing in this Agreement shall affect in any
          --------------------
manner whatsoever the right or power of the Company, or a parent or subsidiary
of the Company, to terminate Purchaser's employment, for any reason, with or
without cause.

     8    Non-compete.   Purchaser agrees that from and after the date hereof
          -----------
until (2) years after the date Purchaser is no longer employed by the Company,
Purchaser shall not engage in, own, manage, control, or participate in the
management, ownership or control, directly or indirectly, of any person, firm,
corporation or other entity engaged in the provision, sales or marketing of
goods and services related to house pets insofar as said goods and services are
to be sold on the internet through a proprietary web site (the "Restricted
Business") anywhere in the world (the "Restricted Area").  Notwithstanding the
foregoing, the Purchaser may acquire shares representing not more than 5% of the
outstanding securities of any publicly-traded company engaged in the Restricted
Business.  The covenant contained in this Section 8 shall be construed as a
series of separate covenants, one for each country in the world and in each
province or state within such country.  If, in any judicial proceeding, a court
shall refuse to enforce any of such separate covenants, such unenforceable
covenant shall be deemed deleted form this Agreement to the extent necessary to
permit the remaining separate covenants included in this Section 8 to be
enforced.

     9.   Section 83(b) Election.  Purchaser understands that Section 83(a) of
          ----------------------
the Internal Revenue Code of 1986, as amended (the "Code"), taxes as ordinary
                                                    ----
income the difference between the amount paid for the Shares and the fair market
value of the Shares as of the date any restrictions on the Shares lapse.  In
this context, "restriction" means the right of the Company to buy back the
               -----------
Shares pursuant to the Repurchase Option set forth in Section 3(a) of this
Agreement.  Purchaser understands that Purchaser may elect to be taxed at the
time the Shares are purchased, rather than when and as the Repurchase Option
expires, by filing an election under Section 83(b) (an "83(b) Election") of the
                                                        --------------
Code with the Internal Revenue Service within 30 days from the date of purchase.
Even if the fair market value of the Shares at the time of the execution of this
Agreement equals the amount paid for the Shares, the election must be made to
avoid income under Section 83(a) in the future.  Purchaser understands that
failure to file such an election in a timely manner may result in adverse tax
consequences for Purchaser.  Purchaser further understands that an additional
copy of such election form should be filed with his or her federal income tax
return for the calendar year in which the date of this Agreement falls.
Purchaser acknowledges that the foregoing is only a summary of the effect of
United States federal income taxation with respect to purchase of the Shares
hereunder, and does not purport to be complete.  Purchaser further acknowledges
that the Company has directed Purchaser to seek independent advice regarding the
applicable provisions of the Code, the income tax laws of any

                                      -7-
<PAGE>

municipality, state or foreign country in which Purchaser may reside, and the
tax consequences of Purchaser's death.

          Purchaser agrees that he will execute and deliver to the Company with
this executed Agreement a copy of the Acknowledgment and Statement of Decision
Regarding Section 83(b) Election (the "Acknowledgment"), attached hereto as
                                       --------------
Exhibit D.  Purchaser further agrees that Purchaser will execute and submit with
---------
the Acknowledgment a copy of the 83(b) Election, attached hereto as Exhibit E,
                                                                    ---------
if Purchaser has indicated in the Acknowledgment his or her decision to make
such an election.

     10.  Market Standoff Agreement.  In connection with the initial public
          -------------------------
offering of the Company's securities and upon request of the Company or the
underwriters managing any underwritten offering of the Company's securities,
Purchaser agrees not to sell, make any short sale of, loan, grant any option for
the purchase of, or otherwise dispose of any Shares (other than those included
in the registration) without the prior written consent of the Company or such
underwriters, as the case may be, for such period of time (not to exceed the
earlier of (i) 180 days; or (ii) the maximum period of time that any director,
officer or shareholder holding not less than 1% of the equity securities of the
Company shall be obligated pursuant to similar restrictions) from the effective
date of such registration as may be requested by the Company or such managing
underwriters and to execute an agreement reflecting the foregoing as may be
requested by the underwriters at the time of the public offering.

     11.  Miscellaneous.
          -------------

          (a) Governing Law.  This Agreement and all acts and transactions
              -------------
pursuant hereto and the rights and obligations of the parties hereto shall be
governed, construed and interpreted in accordance with the laws of the State of
California, without giving effect to principles of conflicts of law.

          (b) Entire Agreement; Enforcement of Rights.  This Agreement sets
              ---------------------------------------
forth the entire agreement and understanding of the parties relating to the
subject matter herein and merges all prior discussions between them.  No
modification of or amendment to this Agreement, nor any waiver of any rights
under this Agreement, shall be effective unless in writing signed by the parties
to this Agreement.  The failure by either party to enforce any rights under this
Agreement shall not be construed as a waiver of any rights of such party.

          (c) Severability.  If one or more provisions of this Agreement are
              ------------
held to be unenforceable under applicable law, the parties agree to renegotiate
such provision in good faith.  In the event that the parties cannot reach a
mutually agreeable and enforceable replacement for such provision, then (i) such
provision shall be excluded from this Agreement, (ii) the balance of the
Agreement shall be interpreted as if such provision were so excluded and (iii)
the balance of the Agreement shall be enforceable in accordance with its terms.

          (d) Construction.  This Agreement is the result of negotiations
              ------------
between and has been reviewed by each of the parties hereto and their respective
counsel, if any; accordingly,

                                      -8-
<PAGE>

this Agreement shall be deemed to be the product of all of the parties hereto,
and no ambiguity shall be construed in favor of or against any one of the
parties hereto.

          (e) Notices.  Any notice required or permitted by this Agreement shall
              -------
be in writing and shall be deemed sufficient when delivered personally or sent
by telegram or fax or forty-eight (48) hours after being deposited in the U.S.
mail, as certified or registered mail, with postage prepaid, and addressed to
the party to be notified at such party's address as set forth below or as
subsequently modified by written notice.

          (f) Counterparts.  This Agreement may be executed in two or more
              ------------
counterparts, each of which shall be deemed an original and all of which
together shall constitute one instrument.

          (g) Successors and Assigns.  The rights and benefits of this Agreement
              ----------------------
shall inure to the benefit of, and be enforceable by the Company's successors
and assigns.  The rights and obligations of Purchaser under this Agreement may
only be assigned with the prior written consent of the Company.

          (h) California Corporate Securities Law.  THE SALE OF THE SECURITIES
              -----------------------------------
WHICH ARE THE SUBJECT OF THIS AGREEMENT HAS NOT BEEN QUALIFIED WITH THE
COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE ISSUANCE OF THE
SECURITIES OR THE PAYMENT OR RECEIPT OF ANY PART OF THE CONSIDERATION THEREFOR
PRIOR TO THE QUALIFICATION IS UNLAWFUL, UNLESS THE SALE OF SECURITIES IS EXEMPT
FROM QUALIFICATION BY SECTION 25100, 25102 OR 25105 OF THE CALIFORNIA
CORPORATIONS CODE.  THE RIGHTS OF ALL PARTIES TO THIS AGREEMENT ARE EXPRESSLY
CONDITIONED UPON THE QUALIFICATION BEING OBTAINED, UNLESS THE SALE IS SO EXEMPT.

                            [Signature Page Follows]

                                      -9-
<PAGE>

     The parties have executed this Agreement as of the date first set forth
above.

                                  PETOPIA.COM, INC.

                                       By: /s/ Lorne K. Abony
                                          -------------------------
                                       Name: Lorne K. Abony
                                       Title:  President

                                       Address:
                                       357 Tehama
                                       San Francisco, CA 94103-4113

     PURCHASER ACKNOWLEDGES AND AGREES THAT THE VESTING OF SHARES PURSUANT TO
SECTION 3 HEREOF IS EARNED ONLY BY CONTINUING SERVICE AS AN EMPLOYEE OR
CONSULTANT AT THE WILL OF THE COMPANY.  PURCHASER FURTHER ACKNOWLEDGES AND
AGREES THAT NOTHING IN THIS AGREEMENT SHALL CONFER UPON PURCHASER ANY RIGHT WITH
RESPECT TO CONTINUATION OF SUCH EMPLOYMENT OR CONSULTING RELATIONSHIP WITH THE
COMPANY, NOR SHALL IT INTERFERE IN ANY WAY WITH PURCHASER'S RIGHT OR THE
COMPANY'S RIGHT TO TERMINATE PURCHASER'S EMPLOYMENT OR CONSULTING RELATIONSHIP
AT ANY TIME, WITH OR WITHOUT CAUSE.

                                  PURCHASER:

                                  Andrea C. Reisman

                                  /s/ Andrea C. Reisman
                                  ---------------------
                                  (Signature)

                                  Address:

Vesting Commencement
Date: April 15, 1999

            SIGNATURE PAGE OF RESTRICTED STOCK PURCHASES AGREEMENT
            ------------------------------------------------------

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