I take my Rex and kill diplo and paracers along rivers and keep the prime in the Rex's inventory, when I find one I transfer meat knock it out and continue to tame even if others are attacking, then a couple seconds later BOOM you got a compy
They will take with any meat, I suggest to kill the others that you don't want and tame the one that you want. Quick games but usually found near one or two dills. Well at least for me. This is for those that need this.