iv ores . ▁Some ▁car n iv orous ▁verte br ates , ▁such ▁as ▁dogs ▁and ▁c ats , ▁are ▁known ▁to ▁eat ▁grass ▁occasionally . ▁Gr ass ▁consumption ▁in ▁dogs ▁can ▁be ▁a ▁way ▁to ▁rid ▁their ▁int est inal ▁tract ▁of ▁par as ites ▁that ▁may ▁be ▁threaten ing ▁to ▁the ▁car n iv ore ' s ▁health . ▁Vari ous ▁in verte br ates ▁also ▁have ▁gr amin iv orous ▁di ets . ▁Many ▁grass ho ppers , ▁such ▁as ▁individuals ▁from ▁the ▁family ▁Ac rid idae , ▁have ▁di ets ▁consisting ▁primarily ▁of ▁plants ▁from ▁the ▁family ▁Po aceae . ▁ ▁Gr amin iv ores ▁generally ▁exhib it ▁a ▁preference ▁on ▁which ▁species ▁of ▁grass ▁they ▁choose ▁to ▁consume . ▁For ▁example , ▁according ▁to ▁a ▁study ▁done ▁on ▁North ▁American ▁b ison ▁( B ison ▁b ison ▁L .) ▁feed ing ▁on ▁short gr ass ▁pla ins ▁in ▁north - e astern ▁Colorado , ▁the ▁cattle ▁consum ed ▁a ▁total ▁of ▁thirty - six ▁different ▁species ▁of ▁plant . ▁Of ▁that ▁thirty - six , ▁five ▁grass ▁species ▁were ▁fav oured ▁and ▁consum ed ▁the ▁most ▁per vas ively . ▁The ▁average ▁consumption ▁of ▁these ▁five ▁species ▁compr ised ▁about ▁ 8 0 % ▁of ▁their ▁di et . ▁A ▁few ▁of ▁these ▁species ▁include ▁Arist ida ▁long is eta ▁Ste ud ., ▁Mu hlen berg ia ▁sp ., ▁and ▁B out el ou a ▁g rac ilis ▁( H . B . K .) ▁Lag . ▁