HESKA CORPORATION

                            1997 STOCK INCENTIVE PLAN

                            (As Amended May 17, 2001)

                                HESKA CORPORATION

                            1997 STOCK INCENTIVE PLAN


1.   ARTICLE 1.  INTRODUCTION.

          The  Plan  was  adopted by the Board effective March  15,  1997.   The
purpose  of the Plan is to promote the long-term success of the Company and  the
creation  of  stockholder value by (a) encouraging Employees, Outside  Directors
and  Consultants to focus on critical long-range objectives, (b) encouraging the
attraction  and  retention of Employees, Outside Directors and Consultants  with
exceptional  qualifications  and (c) linking Employees,  Outside  Directors  and
Consultants directly to stockholder interests through increased stock ownership.
The  Plan seeks to achieve this purpose by providing for Awards in the  form  of
Restricted  Shares or Options (which may constitute incentive stock  options  or
nonstatutory stock options).

          The  Plan shall be governed by, and construed in accordance with,  the
laws of the State of Colorado (except their choice-of-law provisions).

2.   ARTICLE 2.  ADMINISTRATION.

2.1  COMMITTEE COMPOSITION.  The Plan shall be administered by the Committee.
The Committee shall consist exclusively of two or more directors of the Company,
who  shall be appointed by the Board.  In addition, the composition of  the
Committee shall satisfy:

 (a)  Such requirements as the Securities and Exchange Commission may establish
 for administrators acting under plans intended to qualify for exemption under
 Rule 16b-3 (or its successor) under the Exchange Act; and

 (b)  Such requirements as the Internal Revenue Service may establish for
 outside directors acting under plans intended to qualify for exemption under
 section 162(m)(4)(C) of the Code.

The  Board  may also appoint one or more separate committees of the Board,  each
composed  of  one  or  more directors of the Company who need  not  satisfy  the
foregoing  requirements, who may administer the Plan with respect  to  Employees
and  Consultants  who are not considered officers or directors  of  the  Company
under  section 16 of the Exchange Act, may grant Awards under the Plan  to  such
Employees and Consultants and may determine all terms of such Awards.

2.2  COMMITTEE RESPONSIBILITIES.  The Committee shall (a) select the Employees,
Outside Directors and Consultants who are to receive Awards under the Plan, (b)
determine  the  type, number, vesting requirements and other  features  and
conditions  of such Awards, (c) interpret the Plan and (d) make  all  other
decisions relating to the operation of the Plan.  The Committee may adopt such
rules  or  guidelines as it deems appropriate to implement the  Plan.   The
Committee's determinations under the Plan shall be final and binding on all
persons.

3.   ARTICLE 3.  SHARES AVAILABLE FOR GRANTS.

3.1   BASIC LIMITATION.  Common Shares issued pursuant to the Plan  may  be
authorized but unissued shares or treasury shares.  The aggregate number of
Options  and Restricted Shares awarded under the Plan shall not exceed  (a)
1,350,000 plus (b) the aggregate number of Common Shares remaining available for
grants under the Predecessor Plans on March 15, 1997, plus (c) the additional
Common Shares described in Sections 3.2 and 3.3.  No additional grants shall be
made under the Predecessor Plans after March 15, 1997.  The limitation of this
Section 3.1 shall be subject to adjustment pursuant to Article 9.

3.2  ANNUAL INCREASE IN SHARES. As of January 1 of each year, commencing with
the year 1998, the aggregate number of Options and Restricted Shares that may be
awarded under the Plan shall be increased by a number of Common Shares equal to
the lesser of (a) 5% of the total number of Common Shares outstanding as of the
next preceding December 31 or (b) 1,500,000.

3.3   ADDITIONAL SHARES.  If Options granted under this Plan or  under  the
Predecessor Plans are forfeited or terminate for any other reason before being
exercised, then the corresponding Common Shares shall become available for the
grant of Options and Restricted Shares under this Plan.  If Restricted Shares
are forfeited, then the corresponding Common Shares shall again become available
for  the grant of NQOs and Restricted Shares under the Plan.  The aggregate
number of Common Shares that may be issued under the Plan upon the exercise of
ISOs shall not be increased when Restricted Shares are forfeited.

4.   ARTICLE 4.  ELIGIBILITY.

4.1  NONSTATUTORY STOCK OPTIONS AND RESTRICTED SHARES.  Only Employees, Outside
Directors and Consultants shall be eligible for the grant of NQOs and Restricted
Shares.

4.2  INCENTIVE STOCK OPTIONS.  Only Employees who are common-law employees of
the Company, a Parent or a Subsidiary shall be eligible for the grant of ISOs.
In addition, an Employee who owns more than 10% of the total combined voting
power of all classes of outstanding stock of the Company or any of its Parents
or  Subsidiaries shall not be eligible for the grant of an ISO  unless  the
requirements set forth in section 422(c)(6) of the Code are satisfied.

5.   ARTICLE 5.  OPTIONS.

5.1  STOCK OPTION AGREEMENT.  Each grant of an Option under the Plan shall be
evidenced by a Stock Option Agreement between the Optionee and the Company.
Such Option shall be subject to all applicable terms of the Plan and may be
subject to any other terms that are not inconsistent with the Plan.  The Stock
Option Agreement shall specify whether the Option is an ISO or an NQO.  The
provisions of the various Stock Option Agreements entered into under the Plan
need  not be identical.  Options may be granted in consideration of a  cash
payment or in consideration of a reduction in the Optionee's other compensation.
A  Stock  Option  Agreement may provide that a new Option will  be  granted
automatically to the Optionee when he or she exercises a prior Option and pays
the Exercise Price in the form described in Section 6.2.

 5.2  NUMBER OF SHARES.  Each Stock Option Agreement shall specify the number of
 Common Shares subject to the Option and shall provide for the adjustment of
 such number in accordance with Article 9. Options granted to any Optionee in  a
 single  fiscal year of the Company shall not cover more than 500,000 Common
 Shares, except that Options granted to a new Employee in the fiscal year of the
 Company in which his or her service as an Employee first commences shall not
 cover more than one million Common Shares.  The limitations set forth in the
 preceding sentence shall be subject to adjustment in accordance with Article 9.

 5.3  EXERCISE PRICE.  Each Stock Option Agreement shall specify the Exercise
 Price; provided that the Exercise Price under an ISO shall in no event be less
 than 100% of the Fair Market Value of a Common Share on the date of grant and
 the Exercise Price under an NQO shall in no event be less than 85% of the Fair
 Market Value of a Common Share on the date of grant.  In the case of an NQO, a
 Stock Option Agreement may specify an Exercise Price that varies in accordance
 with a predetermined formula while the NQO is outstanding.

 5.4  EXERCISABILITY AND TERM.  Each Stock Option Agreement shall specify the
 date when all or any installment of the Option is to become exercisable.  The
 Stock Option Agreement shall also specify the term of the Option; provided that
 the term of an ISO shall in no event exceed 10 years from the date of grant.  A
 Stock Option Agreement may provide for accelerated exercisability in the event
 of  the Optionee's death, disability or retirement or other events and  may
 provide  for  expiration prior to the end of its term in the event  of  the
 termination of the Optionee's service.  NQOs may also be awarded in combination
 with Restricted Shares, and such an Award may provide that the NQOs will not be
 exercisable unless the related Restricted Shares are forfeited.

 5.5  EFFECT OF CHANGE IN CONTROL.  The Committee may determine, at the time of
 granting an Option or thereafter, that such Option shall become exercisable as
 to all or part of the Common Shares subject to such Option in the event that a
 Change in Control occurs with respect to the Company, subject to the following
 limitations:

   (a)  In the case of an ISO, the acceleration of exercisability shall not
   occur  without the Optionee's written consent.

   (b)  If the Company and the other party to the transaction constituting a
   Change in Control agree that such transaction is to be treated as a "pooling
   of interests" for financial reporting purposes, and if such transaction in
   fact is so treated, then the acceleration of exercisability shall not occur
   to the extent that the surviving entity's independent public accountants
   determine in good faith that such acceleration would preclude the use of
   "pooling of interests" accounting.

 5.6  MODIFICATION OR ASSUMPTION OF OPTIONS.  Within the limitations of
 the Plan, the Committee may modify, extend or assume outstanding options ore
 may accept thcancellation of outstanding options (whether granted by the
 Company or by another issuer) in return for the grant of new options for the
 same or a different number of shares and at the same or a different exercise
 price.  The foregoing notwithstanding, no modification of an Option shall,
 without  the consent of the Optionee, alter or impair his or her rights or
 obligations under such Option.

 5.7  BUYOUT PROVISIONS.  The Committee may at any time (a) offer to buy out for
 a  payment in cash or cash equivalents an Option previously granted or  (b)
 authorize an Optionee to elect to cash out an Option previously granted, in
 either  case at such time and based upon such terms and conditions  as  the
 Committee shall establish.

6.   ARTICLE 6.  PAYMENT FOR OPTION SHARES.

 6.1   GENERAL RULE.  The entire Exercise Price of Common Shares issued upon
 exercise of Options shall be payable in cash or cash equivalents at the time
 when such Common Shares are purchased, except as follows:

   (a)  In the case of an ISO granted under the Plan, payment shall be made only
   pursuant to the express provisions of the applicable Stock Option Agreement.
   The Stock Option Agreement may specify that payment may be made in
   any form(s)described in this Article 6.

   (b)  In the case of an NQO, the Committee may at any time accept payment
   in any form(s) described in this Article 6.

 6.2  SURRENDER OF STOCK. To the extent that this Section 6.2 is applicable,
 all or any part of the Exercise Price may be paid by surrendering, of
 attesting to the ownership of, Common Shares that are already owned by the
 Optionee.  Such Common Shares shall be valued at their Fair Market Value
 on the date when the new  Common  Shares are purchased under the Plan.
 The Optionee  shall  not surrender, or attest to the ownership of, Common
 Shares in payment of the Exercise Price if such action would cause the
 Company to recognize compensation expense (or additional compensation
 expense) with respect to the Option for financial reporting purposes.

 6.3  EXERCISE/SALE.  To the extent that this Section 6.3 is applicable, all or
 any  part  of the Exercise Price and any withholding taxes may be  paid  by
 delivering (on a form prescribed by the Company) an irrevocable direction to a
 securities broker approved by the Company to sell all or part of the Common
 Shares being purchased under the Plan and to deliver all or part of the sales
 proceeds to the Company.

 6.4  EXERCISE/PLEDGE.  To the extent that this Section 6.4 is applicable,
 all or any  part  of the Exercise Price and any withholding taxes may be  paid
 by delivering (on a form prescribed by the Company) an irrevocable direction
 to pledge all or part of the Common Shares being purchased under the Plan
 to a securities broker or lender approved by the Company, as security for a
 loan,  and to deliver all or part of the loan proceeds to the Company.

 6.5  PROMISSORY NOTE.  To the extent that this Section 6.5 is applicable,
 all or any  part  of the Exercise Price and any withholding taxes may be  paid
 by delivering (on a form prescribed by the Company) a full-recourse
 promissory note; provided that the par value of the Common Shares
 being purchased under the Plan shall be paid in cash or cash equivalents.

 6.6  OTHER FORMS OF PAYMENT.  To the extent that this Section 6.6 is,
 applicable all or any part of the Exercise Price and any withholding taxes
 may be paid in any other form that is consistent with applicable laws,
 regulations and rules.

 7.   ARTICLE 7.  AUTOMATIC OPTION GRANTS TO OUTSIDE DIRECTORS

 7.1  INITIAL GRANTS.  Each Outside Director who first becomes a member of the
 Board shall receive a one-time grant of an NQO covering 40,000 Common Shares
 (subject to adjustment under Article 9).  Such NQO shall be granted on the date
 when  such  Outside Director first joins the Board and shall be exercisable
 immediately.  Common Shares issued upon exercise of such NQO shall be
 subject to repurchase by the Company at the Exercise Price in the event of the
 termination of  such Outside Director's service for any reason.  The Company's
 right to repurchase such Common Shares shall lapse in four equal installments
 at annual intervals over the 48-month period commencing on the date of grant.

 7.2  ANNUAL GRANTS.  Upon the conclusion of each regular annual meeting of the
 Company's stockholders (i) each Outside Director who will continue serving as a
 member  of the Board thereafter shall receive an NQO covering 40,000 Common
 Shares, except that such NQO shall not be granted in the calendar year in which
 the same Outside Director received the NQO described in Section 7.1, and (ii)
 each director who will serve as chairman of a Board committee thereafter shall
 receive  an  NQO covering 2,000 Common Shares (both awards are  subject  to
 adjustment under Article 9).  Common Shares issued upon exercise of such NQO
 shall be subject to repurchase by the Company at the Exercise Price in the
 event of  the termination of such Outside Director's service for any reason.
 The Company's right to repurchase such Common Shares shall lapse in
 full on the first anniversary of the date of grant.

 7.3  ACCELERATED EXERCISABILITY. The Company's right to repurchase
 Common Shares issued to an Outside Director under this Article 7 shall
 also lapse in full in the event of:

   (a)  The termination of such Outside Director's service because of
   death, total and permanent disability or retirement at or after age 65; or

   (b)  A Change in Control with respect to the Company, except as provided
   in the next following sentence.

 If the Company and the other party to the transaction constituting a Change
 in  Control  agree that such transaction is to be treated as a "pooling  of
 interests"  for  financial reporting purposes, and if such  transaction  in
 fact is so treated, then the acceleration of vesting shall not occur to the
 extent that the surviving entity's independent public accountants determine
 in  good faith that such acceleration would preclude the use of "pooling of
 interests" accounting.

 7.4  EXERCISE PRICE.  The Exercise Price under all NQOs granted to an Outside
 Director under this Article 7 shall be equal to 100% of the Fair Market Value
 of a Common Share on the date of grant, payable in one of the forms
 described in Sections 6.1, 6.2, 6.3 and 6.4.

 7.5  TERM.  All NQOs granted to an Outside Director under this Article 7 shall
 terminate on the earliest of (a) the 10th anniversary of the date of grant,
 (b)  the date three months after the termination of such Outside Director's
 service for any reason other than death or total and permanent disability or
 (c) the date 12 months after the termination of such Outside Director's service
 because of death or total and permanent disability.

 7.6  AFFILIATES OF OUTSIDE DIRECTORS.  The Committee may provide that the NQOs
 that otherwise would be granted to an Outside Director under this Article 7
 shall  instead  be granted to an affiliate of such Outside Director.   Such
 affiliate shall then be deemed to be an Outside Director for purposes of the
 Plan,  provided that the service-related vesting and termination provisions
 pertaining to the NQOs shall be applied with regard to the service  of  the
 Outside Director.

8.   ARTICLE 8.  RESTRICTED SHARES.

 8.1  TIME, AMOUNT AND FORM OF AWARDS.  Awards under the Plan may be granted in
 the  form  of Restricted Shares.  Restricted Shares may also be awarded  in
 combination with NQOs, and such an Award may provide that the Restricted Shares
 will be forfeited in the event that the related NQOs are exercised.

 8.2  PAYMENT FOR AWARDS.  To the extent that an Award is granted in the form of
 newly issued Restricted Shares, the Award recipient, as a condition to the
 grant of such Award, shall be required to pay the Company in cash or cash
 equivalents an amount equal to the par value of such Restricted Shares.  To the
 extent that an  Award  is  granted in the form of Restricted Shares from the
 Company's treasury, no cash consideration shall be required of the Award
 recipients.  Any amount not paid in cash may be paid with a full-recourse
 promissory note.

 8.3  VESTING CONDITIONS.  Each Award of Restricted Shares may or may not be
 subject to vesting.  Vesting shall occur, in full or in installments,  upon
 satisfaction of the conditions specified in the Stock Award Agreement.  A Stock
 Award  Agreement may provide for accelerated vesting in the  event  of  the
 Participant's death, disability or retirement or other events.  The Committee
 may determine, at the time of granting Restricted Shares or thereafter, that
 all or part of such Restricted Shares shall become vested in the event that
 a Change in Control occurs with respect to the Company, except as provided
 in the next  following  sentence.  If the Company and the other party to
 the transaction constituting a Change in Control agree that such transaction
 is to be treated as a "pooling of interests" for financial reporting
 purposes, and if suchtransaction in fact is so treated, then the
 acceleration of vesting shall not occur to the extent that the surviving
 entity's independent public accountants determine in good faith that such
 acceleration would preclude the use of "pooling of interests" accounting.

 8.4  VOTING AND DIVIDEND RIGHTS.  The holders of Restricted Shares awarded
 Company's under the Plan shall have the same voting, dividend and other rights
 as the other stockholders.  A Stock Award Agreement, however, may require
 that the holders of Restricted Shares invest any cash dividends received
 in additional Restricted Shares.  Such additional Restricted Shares shall be
 subject to the same  conditions and restrictions as the Award with respect
 to  which  the dividends were paid.

9.   ARTICLE 9.  PROTECTION AGAINST DILUTION.

 9.1   ADJUSTMENTS.  In the event of a subdivision of the outstanding Common
 Shares, a declaration of a dividend payable in Common Shares, a declaration
 of a dividend payable in a form other than Common Shares in an amount that
 has a material effect on the price of Common Shares, a combination or
 consolidation of the outstanding Common Shares (by reclassification or
 otherwise) into a lesser number of Common Shares, a recapitalization, a
 spin-off or a similar occurrence, the Committee shall make such adjustments
 as it, in its sole discretion, deems appropriate in one or more of (a) the
 number of Options and Restricted Shares available for future Awards under
 Article 3, (b) the limitations set forth in Section 5.2, (c) the number of
 NQOs to be granted to Outside Directors under Article 7; (d) the number of
 Common Shares covered by each outstanding Option or (e) the Exercise Price
 under each outstanding Option.  Except as provided in this Article 9, a
 Participant shall have no rights by reason of any issue by the Company of
 stock of any class or securities convertible into stock of any class, any
 subdivision or consolidation of shares of stock of any class, the payment
 of any stock dividend or any other increase or decrease in the number of
 shares of stock of any class.

 9.2   DISSOLUTION OR LIQUIDATION.  To the extent not previously  exercised,
 Options shall terminate immediately prior to the dissolution or liquidation of
 the Company.

 9.3  REORGANIZATIONS.  In the event that the Company is a party to a merger or
 other reorganization, outstanding Options and Restricted Shares shall be
 subject to  the agreement of merger or reorganization.  Such agreement may
 provide, without limitation, for the continuation of outstanding Awards by
 the Company (if  the Company is a surviving corporation), for their assumption
 by the surviving corporation or its parent or subsidiary, for the substitution
 by the surviving corporation or its parent or subsidiary of its own awards for
 such Awards, for accelerated vesting and accelerated expiration, or for
 settlement in cash or cash equivalents.

 10.  ARTICLE 10. AWARDS UNDER OTHER PLANS.

The  Company  may grant awards under other plans or programs.  Such  awards
may be settled in the form of Common Shares issued under this Plan.  Such Common
Shares  shall be treated for all purposes under the Plan like Restricted  Shares
and  shall,  when  issued, reduce the number of Common  Shares  available  under
Article 3.

11.  ARTICLE 11. LIMITATION ON RIGHTS.

 11.1 RETENTION RIGHTS.  Neither the Plan nor any Award granted under the Plan
 shall be deemed to give any individual a right to remain an Employee, Outside
 Director  or  Consultant.   The Company and its Parents,  Subsidiaries  and
 Affiliates reserve the right to terminate the service of any Employee, Outside
 Director or Consultant at any time, with or without cause, subject to
 applicable laws,  the Company's certificate of incorporation and by-laws
 and a written employment agreement (if any).

 11.2 STOCKHOLDERS' RIGHTS.  A Participant shall have no dividend rights, voting
 rights  or other rights as a stockholder with respect to any Common  Shares
 covered by his or her Award prior to the time when a stock certificate for such
 Common Shares is issued or, in the case of an Option, the time when he or she
 becomes entitled to receive such Common Shares by filing a notice of exercise
 and paying the Exercise Price.  No adjustment shall be made for cash dividends
 or  other rights for which the record date is prior to such time, except as
 expressly provided in the Plan.

 11.3 REGULATORY REQUIREMENTS.  Any other provision of the Plan notwithstanding,
 the obligation of the Company to issue Common Shares under the Plan shall be
 subject to all applicable laws, rules and regulations and such approval by any
 regulatory body as may be required.  The Company reserves the right to
 restrict, in whole or in part, the delivery of Common Shares pursuant to any
 Award prior to the satisfaction of all legal requirements relating to the
 issuance of such Common  Shares, to their registration, qualification or
 listing  or  to  an exemption from registration, qualification or listing.

12.  ARTICLE 12. WITHHOLDING TAXES.

 12.1 GENERAL.  To the extent required by applicable federal, state, local or
 foreign  law, a Participant or his or her successor shall make arrangements
 satisfactory  to  the Company for the satisfaction of any  withholding  tax
 obligations that arise in connection with the Plan.  The Company shall not be
 required to issue any Common Shares or make any cash payment under the Plan
 until such obligations are satisfied.

 12.2 SHARE WITHHOLDING.  The Committee may permit a Participant to satisfy all
 or  part of his or her withholding or income tax obligations by having  the
 Company withhold all or a portion of any Common Shares that otherwise would be
 issued to him or her or by surrendering all or a portion of any Common Shares
 that he or she previously acquired.  Such Common Shares shall be valued at
 their Fair Market Value on the date when taxes otherwise would be withheld in
 cash.

13.  ARTICLE 13. FUTURE OF THE PLAN.

 13.1 TERM OF THE PLAN.  The Plan, as set forth herein, shall become effective
  on March 14, 1997.  The Plan shall remain in effect until it is terminated
  under Section 13.2, except that no ISOs shall be granted after March 14, 2007.

 13.2 AMENDMENT OR TERMINATION.  The Board may, at any time and for any reason,
 amend or terminate the Plan.  An amendment of the Plan shall be subject to the
 approval of the Company's stockholders only to the extent required by
 applicable laws, regulations or rules. No Awards shall be granted under the
 Plan after the termination thereof.  The termination of the Plan, or any
 amendment thereof, shall not affect any Award previously granted under the
 Plan.

14.  ARTICLE 14. DEFINITIONS.

 14.1 "AFFILIATE" means any entity other than a Subsidiary, if the Company
 and/or one or more Subsidiaries own not less than 50% of such entity.

 14.2 "AWARD" means any award of an Option or a Restricted Share under the Plan.

 14.3 "BOARD" means the Company's Board of Directors, as constituted from
 time to time.

 14.4 "CHANGE IN CONTROL" shall mean:

 (a)  The consummation of a merger or consolidation of the Company with or into
 another entity or any other corporate reorganization, if more than 50% of the
 combined voting power of the continuing or surviving entity's securities
 outstanding immediately after such merger, consolidation or other
 reorganization is owned by persons who were not stockholders of the Company
 immediately prior to such merger, consolidation or other reorganization;

 (b)  The sale, transfer or other disposition of all or substantially all of the
 Company's assets;

 (c)  A change in the composition of the Board, as a result of which fewer than
 50% of the incumbent directors are directors who either (i) had been directors
 of the Company on the date 24 months prior to the date of the event that may
 constitute a Change in Control (the "original directors") or (ii) were elected,
 or nominated for election, to the Board with the affirmative votes of at least
 a majority of the aggregate of the original directors who were still in office
 at the time of the election or nomination and the directors whose election
 or nomination was previously so approved; or

 (d)  Any transaction as a result of which any person is the "beneficial owner"
 (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of
 securities of the Company representing at least 30% of the total voting power
 represented by the Company's then outstanding voting securities.  For purposes
 of this Paragraph (d), the term "person" shall have the same meaning as when
 used in sections 13(d) and 14(d) of the Exchange Act but shall exclude (i) any
 person, or person affiliated with said person, who, on March 15, 1997, is the
 beneficial owner of securities of the Company representing at least 20% of the
 total voting power represented by the Company's then outstanding voting
 securities (11,607,764), (ii) a trustee or other fiduciary holding securities
 under an employee benefit plan of the Company or of a Parent or Subsidiary and
 (iii) a corporation owned directly or indirectly by the stockholders of the
 Company in substantially the same proportions as their ownership of the common
 stock of the Company.

A transaction shall not constitute a Change in Control if its sole purpose is to
change  the state of the Company's incorporation or to create a holding  company
that will be owned in substantially the same proportions by the persons who held
the Company's securities immediately before such transaction.

14.5 "CODE" means the Internal Revenue Code of 1986, as amended.

14.6 "COMMITTEE" means a committee of the Board, as described in Article 2.

14.7 "COMMON SHARE" means one share of the common stock of the Company.

14.8 "COMPANY" means either (a) Heska Corporation, a California corporation
(prior to the formation of Heska Corporation, a Delaware corporation), or
(b) Heska Corporation, a Delaware corporation (following its formation).

14.9 "CONSULTANT" means a consultant or adviser who provides bona fide services
to the Company, a Parent, a Subsidiary or an Affiliate as an independent
contractor.  Service as a Consultant shall be considered employment for all
purposes of the Plan, except as provided in Section 4.2.

14.10     "EMPLOYEE" means a common-law employee of the Company, a Parent, a
Subsidiary or an Affiliate.

14.11     "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

14.12     "EXERCISE PRICE" means the amount for which one Common Share may be
purchased upon exercise of such Option, as specified in the applicable Stock
Option Agreement.

14.13     "FAIR MARKET VALUE" means the market price of Common Shares,
determined by the Committee in good faith on such basis as it deems appropriate.
Whenever possible, the determination of Fair Market Value by the Committee shall
be based on the prices reported in The Wall Street Journal.  Such determination
shall be conclusive and binding on all persons.

14.14     "ISO" means an incentive stock option described in section 422(b) of
the Code.

14.15     "NQO" means a stock option not described in sections 422 or 423 of the
Code.

14.16     "OPTION" means an ISO or NQO granted under the Plan and entitling the
holder to purchase Common Shares.

14.17     "OPTIONEE" means an individual or estate who holds an Option.

14.18     "OUTSIDE DIRECTOR" shall mean a member of the Board who is not an
Employee.  Service as an Outside Director shall be considered employment for all
purposes of the Plan, except as provided in Section 4.2.

14.19     "PARENT" means any corporation (other than the Company) in an unbroken
chain of corporations ending with the Company, if each of the corporations other
than the Company owns stock possessing 50% or more of the total combined voting
power of all classes of stock in one of the other corporations in such chain.  A
corporation that attains the status of a Parent on a date after the adoption of
the Plan shall be considered a Parent commencing as of such date.

14.20     "PARTICIPANT" means an individual or estate who holds an Award.

14.21     "PLAN" means this Heska Corporation 1997 Stock Incentive Plan, as
amended from time to time.

14.22     "PREDECESSOR PLANS" means (a) the 1988 Heska Corporation Stock Plan
and (b) the Heska Corporation 1994 Key Executive Stock Plan.

14.23     "RESTRICTED SHARE" means a Common Share awarded under the Plan.

14.24     "STOCK AWARD AGREEMENT" means the agreement between the Company and
the recipient of a Restricted Share that contains the terms, conditions and
restrictions pertaining to such Restricted Share.

14.25     "STOCK OPTION AGREEMENT" means the agreement between the Company and
an Optionee that contains the terms, conditions and restrictions pertaining to
his or her Option.

14.26     "SUBSIDIARY" means any corporation (other than the Company) in an
unbroken chain of corporations beginning with the Company, if each of the
corporations other than the last corporation in the unbroken chain owns stock
possessing 50% or more of the total combined  voting  power  of  all classes
of stock  in  one  of  the  other corporations  in such chain.  A corporation
that attains the  status  of  a Subsidiary  on a date after the adoption of
the Plan shall be considered a Subsidiary commencing as of such date.

15.  ARTICLE 15. EXECUTION.

 To record the adoption of the Plan by the Board, the Company has caused its
duly authorized officer to execute this document in the name of the Company.

                            Heska Corporation


                            By  /s/ Ronald L. Hendrick
                               Executive Vice President and Chief Financial
                              Officer