Step1:get taming food,I recommend getting prime meat and narcotics(take a few more)

Step2:get taming weapons,get some bolas(if there are more),bow and tranq arrows ,don't use clubs! I learnt it the hard way

Step3:Taming,find a raptor (one that is alone if not craft a few more bolas!),bola them/it us bow and tranq arrows and knock it out(don't get too close) transfer your prime meat and narcotics kill the other one (if there is or you don't need it,I recommend getting the other one as well)

BOOM! you have your own raptor! have fun ! :D

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