Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Wisnewski Nancy
   2. Issuer Name and Ticker or Trading Symbol
HESKA CORP [HSKA] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP, Diag. Ops & Prod. Dev.
(Last)
(First)
(Middle)
3760 ROCKY MOUNTAIN AVENUE		 3. Date of Earliest Transaction (Month/Day/Year)
03/07/2018
(Street)

LOVELAND, CO 80538		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Incentive Stock Option (right to buy) $ 69.77 03/07/2018   A   1,433     (1) 03/06/2028 Common Stock 1,433 $ 0 1,433 D  
Non-Qualified Stock Option (right to buy) $ 69.77 03/07/2018   A   18,567     (1) 03/06/2028 Common Stock 18,567 $ 0 18,567 D  
Performance Shares (2) 03/07/2018   A   4,688     (2) 03/31/2025 Common Stock 4,688 $ 0 4,688 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Wisnewski Nancy
3760 ROCKY MOUNTAIN AVENUE
LOVELAND, CO 80538		       EVP, Diag. Ops & Prod. Dev.  

Signatures

 By: Jason A. Napolitano For: Nancy Wisnewski   03/09/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The aggregate of these two option awards vests in three approximately equal annual installments beginning on March 7, 2019 and ending on March 7, 2021.
(2) The vesting of each of three approximately equal performance share tranches is contingent on the achievement of certain market-vesting thresholds based on the price per share of Heska's common stock average over a 20-day trailing trading period. The first tranche is to vest at the later of the achievement of $87.21 per share or the second anniversary of grant date. The second tranche is to vest at the later of the achievement of $101.17 per share or the third anniversary of grant date. The third tranche is to vest at the later of the achievement of $122.10 per share or the fourth anniversary of grant date. Any performance shares that do not vest by March 31, 2025 are to be forfeited.

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