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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G


                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                              (AMENDMENT NO. ___)*


                                Heska Corporation
        ----------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
        ----------------------------------------------------------------
                         (Title of Class of Securities)


                                   42805E 10 8
        ----------------------------------------------------------------
                                 (CUSIP Number)


                                February 6, 2001
        ----------------------------------------------------------------
             (Date of Event Which Requires Filing of This Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

               [ ]    Rule 13d-1(b)

               [X]    Rule 13d-1(c)

               [ ]    Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED
IN THIS FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY
VALID OMB CONTROL NUMBER.


SEC 1745 (3-98)


                                Page 1 of 4 pages
   2


---------------------                                          -----------------
CUSIP NO. 42805E 10 8                 13G                      PAGE 2 OF 4 PAGES
---------------------                                          -----------------

--------------------------------------------------------------------------------
   1       NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO(S). OF ABOVE PERSON(S) (ENTITIES ONLY)

           LOMBARD ODIER & CIE
--------------------------------------------------------------------------------
   2       CHECK THE APPROPRIATE BOX IF A MEMBEROF A GROUP*
           (a)
           (b)
--------------------------------------------------------------------------------
   3       SEC USE ONLY

--------------------------------------------------------------------------------
   4       CITIZENSHIP OR PLACE OF ORGANIZATION

           SWITZERLAND
--------------------------------------------------------------------------------
                          5   SOLE VOTING POWER
        NUMBER OF             2,755,000
         SHARES          -------------------------------------------------------
      BENEFICIALLY        6   SHARED VOTING POWER
        OWNED BY              0
          EACH           -------------------------------------------------------
        REPORTING         7   SOLE DISPOSITIVE POWER
         PERSON               2,755,000
          WITH:          -------------------------------------------------------
                          8   SHARED DISPOSITIVE POWER
                              19,200
--------------------------------------------------------------------------------
 9         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           2,774,200
--------------------------------------------------------------------------------
 10        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
--------------------------------------------------------------------------------
 11        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           7.2%
--------------------------------------------------------------------------------
 12        TYPE OF REPORTING PERSON*

           PN
--------------------------------------------------------------------------------


                      *SEE INSTRUCTION BEFORE FILLING OUT!


                                Page 1 of 4 pages
   3

ITEM 1.

           (a)    NAME OF ISSUER
                  Heska Corporation

           (b)    ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES
                  1613 Prospect Parkway
                  Fort Collins, CO 80525

ITEM 2.
           (a)    NAME OF PERSON FILING
                  Lombard Odier & Cie

           (b)    ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE
                  11 Rue de la Corraterie, 1204 Geneva, Switzerland

           (c)    CITIZENSHIP
                  Switzerland

           (d)    TITLE OF CLASS OF SECURITIES
                  Common Stock

           (e)    CUSIP NUMBER
                  42805E 10 8

ITEM 3.    IF THIS STATEMENT IS FILED PURSUANT TO SECTIONS 240.13d-1(b), OR
           240.13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

           NOT APPLICABLE.

ITEM 4.    OWNERSHIP

        Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.

           (a)    AMOUNT BENEFICIALLY OWNED: 2,774,200

           (b)    PERCENT OF CLASS: 7.2%

           (c)    NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:

                  (i)   SOLE POWER TO VOTE OR TO DIRECT THE VOTE: 2,755,000

                  (ii)  SHARED POWER TO VOTE OR TO DIRECT THE VOTE:  0

                  (iii) SOLE POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF:
                        2,755,000

                  (iv)  SHARED POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF:
                        19,200

ITEM 5.    OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

           Not Applicable.

ITEM 6.    OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

           Of the shares held in the name of Lombard Odier & Cie, 99.31% are
held for the benefit of the Lombard Odier Nutrition Fund which is managed by
Lombard Odier Fund Managers S.A. and 0.69% are held for the benefit of private
or institutional clients. With respect to the shares held for the benefit of
private or institutional clients, such clients have the right to receive or the
power to direct the receipt of dividends from, or the proceeds from the sale of,
such shares and retain sole voting power with respect to such shares.

ITEM 7.    IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
           THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

           Not Applicable.


                                Page 3 of 4 pages
   4

ITEM 8.    IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

           Not Applicable.

ITEM 9.    NOTICE OF DISSOLUTION OF A GROUP

           Not Applicable.

ITEM 10.   CERTIFICATION

           Not Applicable.


        After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

                         February 13, 2001               February 13, 2001
                         -------------------------------------------------------
                                                   Date

                         /s/ Carmela Gokok               /s/ Fernando Perez Diaz
                         -------------------------------------------------------
                                                 Signature

                         Vice President                  Assistant Manager
                         -------------------------------------------------------
                                                Name/Title




                                Page 4 of 4 pages