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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1. Name and Address of Reporting Person * NAPOLITANO JASON A   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) Exec. VP, CFO & Secretary (Last) (First) (Middle) 3760 ROCKY MOUNTAIN AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 03/26/2012 (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 Common Stock 03/26/2012   M   5,000 A $ 7 67,092 D   Common Stock 03/26/2012   M   1 (1) A $ 5.06 (2) 67,093 (1) D   Common Stock 03/26/2012   F   2,971 (3) D $ 11.78 64,122 (1) D   Common Stock               602 I by Spouse (4)

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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

$ 7

03/26/2012

M

5,000

05/31/2002

05/31/2012

Common Stock

5,000

$ 0

42,556

D

Incentive Stock Option

$ 5.06

03/26/2012

M

1

01/31/2007(2)

04/30/2012(2)

Common Stock

1 (2)

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
NAPOLITANO JASON A 3760 ROCKY MOUNTAIN AVENUE LOVELAND, CO 80538			Exec. VP, CFO & Secretary

Signatures

/s/ Jason A. Napolitano		03/28/2012
**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)	Includes one share jointly owned with Robert Grieve.
(2)	Represents a combination of stock option exercises involving fractional shares: 0.6 shares at a price of $3.40 per share from a stock option granted to Robert Grieve on 1/6/03 exercisable on 1/6/04 with expiration date 01/06/13, 0.2 shares at a price of $8.10 per share from a stock option granted to Mr. Napolitano on 4/30/02 exercisable on 4/30/02 with expiration date 4/30/12, 0.1 shares at a price of $7.00 per share from a stock option granted on 5/31/02 exercisable on 5/31/06 with expiration date 5/31/12 and 0.1 shares at a price of $7.00 per share from a stock option granted on 1/31/03 exercisable on 1/31/07 with expiration date 1/31/13. Robert Grieve offered to deliver shares valued at $2.04 and Mr. Napolitano offered to deliver $3.02 in cash for these stock option exercises.
(3)	Mr. Napolitano offered to deliver 2,971 previously owned shares to fulfill all exercise price obligations for his stock option exercises referenced herein.
(4)	Mr. Napolitano disclaims beneficial ownership of all securities of the Issuer owned by his wife.

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