Make four stone Dino gates and get a friend to lead it in to the trap then you go behind it and place the 4th Dino gate to trap it. Then get your other friend to agro it so he can shoot the catapult at its back. Put catapult 3 pillars high
Tranq Arrows/Darts DO NOT WORK!!! To knock this out you need to use a catapult and shoot in only on it's back. If you shoot it on it's legs it will kill it. UP-VOTE SO EVERYONE KNOWS & TO GET DODODEX TO ADD THIS!!!