This is incorrect, in the U.S., at least, grass fed marketing claims can only be used when the steer is exclusively fed on grass: http://www.ams.usda.gov/AMSv1

This is incorrect, in the U.S., at least, grass fed marketing claims can only be used when the steer is exclusively fed on grass: http://www.ams.usda.gov/AMSv1.0/ams.fetchTemplateData.do?template=TemplateN&rightNav1=GrassFedMarketingClaimStandards&topNav=&leftNav=GradingCertificationandVerfication&page=GrassFedMarketingClaims&resultType= http://www.ams.usda.gov/AMSv1.0/ams.fetchTemplateData.do?tem...