Sooo... ThEsE tHiNgS... I attempted to tame one by knocking it out to calm it because I heard a lit of other people did that too. wElL tHaT dIdNt Go WeLl... It took me over 3 times to trap it in a 2 by 1. Then I knocked it out... AnD tHe DaRn ThInG gLiTcHeD. It showed it was knocked out but didnt have any torpor. So here I am standing in a small box with my pter and a nearly dead glitchy Dog. Huh.
Normally you can't tame the pack leader, so just get a pteranodon or argy, pick it up and drop it in a large area (like a separate section of your base). When you take it away from the rest of the pack, it removes its 'pack leader' title, allowing you to tame the highest level hyena of that pack.