-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Vptqv5I3o4vs7XTeJSpIj6CB7gxD7vNgga299akDdkgL7KdpttxwtQ01Vvd3mwQe
 0ZcZYxXix9JWBbt/6GhXWQ==

<SEC-DOCUMENT>0001237648-05-000113.txt : 20051028
<SEC-HEADER>0001237648-05-000113.hdr.sgml : 20051028
<ACCEPTANCE-DATETIME>20051028145143
ACCESSION NUMBER:		0001237648-05-000113
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051027
FILED AS OF DATE:		20051028
DATE AS OF CHANGE:		20051028

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SASEN JOHN F
		CENTRAL INDEX KEY:			0001183764

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22427
		FILM NUMBER:		051162877

	BUSINESS ADDRESS:	
		STREET 1:		4345 SOUTHPOINT BLVD.
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32216

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HESKA CORP
		CENTRAL INDEX KEY:			0001038133
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				770192527
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3760 ROCKY MOUNTAIN AVENUE
		CITY:			LOVELAND
		STATE:			CO
		ZIP:			80538
		BUSINESS PHONE:		9704937272

	MAIL ADDRESS:	
		STREET 1:		3760 ROCKY MOUNTAIN AVENUE
		CITY:			LOVELAND
		STATE:			CO
		ZIP:			80538
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-10-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001038133</issuerCik>
        <issuerName>HESKA CORP</issuerName>
        <issuerTradingSymbol>HSKA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001183764</rptOwnerCik>
            <rptOwnerName>SASEN JOHN F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PSS/WORLD MEDICAL, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4345 SOUTHPOINT BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>JACKSONVILLE</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>32216</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-10-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.08</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>By: Jason A. Napolitano  For: John F. Sasen, Sr.</signatureName>
        <signatureDate>2005-10-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----