Ok I saw a tip saying not too shoot it during its false roar. You absolutely SHOULD shoot it when it does the false roar because it will do the actual roar immediately after so you can feed it narcotic. Also don't use Primitive pump use mastercraft or Ascendant so you can put three to four shots in per roar. If you want a controlled space for taming download the Randi's animal trap mod and use the largest trap. Works wonders