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 * SASEN JOHN F   2. Issuer Name and Ticker or Trading Symbol HESKA CORP [HSKA] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O PSS/WORLD MEDICAL, INC., 4345 SOUTHPOINT BOULEVARD 3. Date of Earliest Transaction (Month/Day/Year) 03/28/2012 (Street) JACKSONVILLE, FL 32216 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 03/28/2012   M   140 A $ 10.8 8,613 D   Common Stock 03/28/2012   M   40 A $ 7.2 8,653 D   Common Stock 03/28/2012   M   140 A $ 7.1 8,793 D   Common Stock 03/28/2012   M   64 A $ 7.8 8,857 D   Common Stock 03/28/2012   M   1 A $ 10.99 8,858 D   Common Stock 03/28/2012   M   1 A $ 11.07 8,859 D

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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

Non-Qualified Stock Option (right to buy)

$ 10.8

03/28/2012

M

140

03/29/2002

03/29/2012

Common Stock

140

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 7.2

03/28/2012

M

40

01/29/2003

01/29/2013

Common Stock

40

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 7.1

03/28/2012

M

140

01/31/2003

01/31/2013

Common Stock

140

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 7.8

03/28/2012

M

64

03/17/2003

03/17/2013

Common Stock

64

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 10.99 (1)

03/28/2012

M

1

05/15/2006(1)

05/12/2016(1)

Common Stock

1

$ 0

0

D

Non-Qualified Stock Option (right to buy)

$ 11.07 (2)

03/28/2012

M

1

05/12/2006(2)

02/28/2015(2)

Common Stock

1

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
SASEN JOHN F C/O PSS/WORLD MEDICAL, INC. 4345 SOUTHPOINT BOULEVARD JACKSONVILLE, FL 32216	X

Signatures

By: Jason A. Napolitano For: John F. Sasen, Sr.		03/29/2012
**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)	Represents a combination of stock option exercises involving fractional shares: 0.4 shares at a price of $10.97 per share from a stock option granted on 05/15/2006 with expiration date 05/15/2016 and 0.6 shares at a price of $11.00 from a stock option granted on 5/12/2006 with expiration date 05/12/2016.
(2)	Represents a combination of stock option exercises involving fractional shares: 0.7 shares at a price of $11.10 per share from a stock option granted on 02/28/2005 with expiration date 02/28/2015 and 0.3 shares at a price of $11.00 from a stock option granted on 5/12/2006 with expiration date 05/12/2016.

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