Taming :you have to shoot it with a sniper/pump shotgun/assault rifle preferably in a good quality so it doesn't break or bring more than one gun then shoot it until it does a weird walk you shoot it more then it will roar and you'll go to it's mouth and put narcotic in hotbar number 0 so you can feed it repeat until knocked out then feed it mutton

Tips :Bio toxin does double the torpor and if you're scared that it might die everytime you feed it the narcotic/biotoxin it fully heals you could also feed it a corpse and finally there's a fake roar you only feed it on the same roar it always does