POWER OF ATTORNEY FOR SECTION 16 REPORTING

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears

below constitutes and appoints Robert B. Grieve,Jason A. Napolitano and Michael

A. Bent, and each of them, his or her true and lawful

attorneys-in-fact, each with capacity as an officer and/or director of Heska

Corporation any Forms 3, 4, and 5 and any amendment thereto, in accordance

with Section l6(a) of the Securities Exchange Act of 1934, as amended, and

the rules thereunder, and to complete and file the same with the Securities

and Exchange Commission and any stock exchange or similar authority, hereby

ratifying and confirming all that each of said attorneys-in-fact or their

substitute or substitutes may do or cause to be done by virtue hereof. The

undersigned acknowledges that the foregoing attorneys-in-fact, in serving

in such capacity at the request of the undersigned, are not assuming, nor

is Heska Corporation assuming, any of the undersigned’s responsibilities to

comply with Section 16 of the Securities Act of 1934. This Power of Attorney

shall remain in full force and effect until the undersigned is no longer

required to file Forms 3, 4 and 5 with respect to the undersigned’s holdings

of and transactions in securities issued by Heska Corporation, unless either

revoked by the undersigned in a signed writing delivered to the foregoing

attorneys-in-fact. IN WITNESS WHEREOF, the undersigned has caused this Power

of Attorney to be executed this 2nd day of May, 2011.

Signature: Print Name: Joseph Aperfine