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                                                                    EXHIBIT 23.3
 
                        CONSENT OF INDEPENDENT AUDITORS
 
     We consent to the reference to our firm under the caption "Experts" and to
the use of our report dated May 30, 1995, with respect to the statements of
income and cash flows of Diamond Animal Health, Inc. for the year ended March
31, 1995 included in the Amendment to Registration Statement (Form S-1) and
related Prospectus of Heska Corporation for the registration of its common
stock.
 
                                                               ERNST & YOUNG LLP
 
Des Moines, Iowa
   
June 24, 1997