FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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. Date of Event Requiring Statement (Month/Day/Year) 03/05/2007 3. Issuer Name and Ticker or Trading Symbol HESKA CORP [HSKA] (Last) (First) (Middle) 3760 ROCKY MOUNTAIN AVENUE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP, Prod Dev & Tech Cust Serv 5. If Amendment, Date Original Filed(Month/Day/Year) 03/09/2007 (Street) LOVELAND, CO 80538 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 54,742 D Â

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Incentive Stock Option (right to buy)	01/06/2003(1)	01/06/2013	Common Stock	15,000	$ 0.34	D	Â
Incentive Stock Option (right to buy)	03/30/2005(2)	03/30/2015	Common Stock	65,000	$ 0.88	D	Â
Incentive Stock Option (right to buy)	04/10/2003(3)	04/10/2013	Common Stock	20,000	$ 0.95	D	Â
Incentive Stock Option (right to buy)	02/05/2002(4)	02/05/2012	Common Stock	35,000	$ 1.06	D	Â
Incentive Stock Option (right to buy)	04/26/2001(5)	04/26/2011	Common Stock	10,000	$ 1.14	D	Â
Incentive Stock Option (right to buy)	11/22/2004(6)	11/22/2014	Common Stock	10,000	$ 1.16	D	Â
Incentive Stock Option (right to buy)	01/12/2002(7)	01/12/2012	Common Stock	10,000	$ 1.21	D	Â
Incentive Stock Option (right to buy)	12/15/2005(2)	12/15/2015	Common Stock	16,716	$ 1.25	D	Â
Incentive Stock Option (right to buy)	09/02/2003(8)	09/02/2013	Common Stock	10,000	$ 1.53	D	Â
Incentive Stock Option (right to buy)	05/18/2004(9)	05/18/2014	Common Stock	17,500	$ 1.59	D	Â
Incentive Stock Option (right to buy)	11/17/2006(2)	11/17/2016	Common Stock	58,241	$ 1.717	D	Â
Incentive Stock Option (right to buy)	11/17/1999(10)	11/17/2009	Common Stock	10,000	$ 2	D	Â
Incentive Stock Option (right to buy)	03/15/1997(11)	03/15/2007	Common Stock	4,792	$ 3	D	Â
Incentive Stock Option (right to buy)	04/06/1999(12)	04/06/2009	Common Stock	7,500	$ 3.06	D	Â
Non-Qualified Stock Option (right to buy)	12/15/2005(2)	12/15/2015	Common Stock	113,284	$ 1.25	D	Â
Non-Qualified Stock Option (right to buy)	11/17/2006(2)	11/17/2016	Common Stock	1,759	$ 1.717	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Wisnewski Nancy 3760 ROCKY MOUNTAIN AVENUE LOVELAND, CO 80538	Â	Â	  VP, Prod Dev & Tech Cust Serv	Â

Signatures

Nancy Wisnewski		03/09/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	This option vested monthly in equal installments over one (1) year through January 6, 2004.
(2)	Option granted is immediately exercisable.
(3)	This option vested monthly in equal installments over four (4) years through April 10, 2007. Vesting was accelerated to full vest on March 30, 2005.
(4)	This option vested monthly in equal installments over four (4) years through February 5, 2006. Vesting was accelerated to full vest on March 30, 2005.
(5)	This option vested monthly in equal installments over four (4) years through April 26, 2005. Vesting was accelerated to full vest on December 2, 2004.
(6)	This option vested monthly in equal installments over four (4) years through November 22, 2008. Vesting was accelerated to full vest on December 2, 2004.
(7)	This option vested monthly in equal installments over four (4) years through January 12, 2006. Vesting was accelerated to full vest on December 2, 2004.
(8)	This option vested monthly in equal installments over four (4) years through September 2, 2007. Vesting was accelerated to full vest on December 2, 2004.
(9)	This option vested monthly in equal installments over four (4) years through January 5, 2008. Vesting was accelerated to full vest on December 2, 2004.
(10)	This option vested monthly in equal installments over four (4) years through November 17, 2003.
(11)	This option vested monthly in equal installments over four (4) years through March 15, 2001.
(12)	This option vested monthly in equal installments over four (4) years through April 6, 2003.

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