Honestly,People are saying things about knocking it out with guns and tranquilizer arrows.What if your near the start of the game? Well,Here's my tip:
Bola it (You can make one pretty early on) and then knock it out.(You can use fists or clubs or anything like that) but make sure you have Narcotics.It's impossible to tame without atleast 15.(This was learned through personal experience)Then give it meat and bam.Tame.