I play on mobile, all i did to tame him was just find a really good spot on a rock where he’ll stuck and stay there kept trying to attack me while i unload all of my tranq darts into him. You’ll need a lot of Narcotics or Bio toxin like A LOT as his torpor decrease really fast, if you bring his favourite kibble and soothing balm you wont have to waste so much narcotics on him