. ▁ ▁Sometimes ▁a ▁her d ▁would ▁be ▁killed ▁just ▁to ▁get ▁at ▁the ▁del ica cies ▁such ▁as ▁the ▁fat - filled ▁tong ues . ▁B ison ▁that ▁escaped ▁the ▁trap ▁were ▁h unted ▁down ▁and ▁killed ▁so ▁they ▁could ▁not ▁warn ▁the ▁other ▁b ison . ▁ ▁Hor se ▁introduction ▁and ▁changing ▁hunting ▁dynamic ▁ ▁Before ▁the ▁introduction ▁of ▁horses , ▁b ison ▁were ▁her ded ▁into ▁large ▁ch utes ▁made ▁of ▁rocks ▁and ▁will ow ▁branches ▁and ▁tra pped ▁in ▁a ▁cor ral ▁called ▁a ▁buff alo ▁p ound ▁and ▁then ▁sla ugh tered ▁or ▁stamp eded ▁over ▁cl iffs , ▁called ▁buff alo ▁j umps . ▁Both ▁p ound ▁and ▁jump ▁arch ae ological ▁sites ▁are ▁found ▁in ▁several ▁places ▁in ▁the ▁U . S . ▁and ▁Canada . ▁In ▁the ▁case ▁of ▁a ▁jump , ▁large ▁groups ▁of ▁people ▁would ▁her d ▁the ▁b ison ▁for ▁several ▁miles , ▁forcing ▁them ▁into ▁a ▁stamp ede ▁that ▁drove ▁the ▁her d ▁over ▁a ▁cl iff . ▁ ▁H ors es ▁taken ▁from ▁the ▁Spanish ▁were ▁well - est ab lished ▁in ▁the ▁nom adic ▁hunting ▁cult ures ▁by ▁the ▁early ▁ 1 7 0 0 s , ▁and ▁ind igen ous ▁groups ▁once ▁living ▁east ▁of ▁the ▁Great ▁Pla ins ▁moved ▁west ▁to ▁h unt ▁the ▁larger ▁b ison ▁population . ▁Inter t rib al ▁war fare ▁forced ▁the ▁Che y ennes ▁to ▁give ▁up ▁their ▁corn fields ▁at ▁Bi ester feld t ▁village ▁and ▁eventually ▁cross ▁west ▁of