Sneak behind, make sure to have rockcarrots in LAST SLOT or you can use potatoes, feed/ride it and it’ll be tamed…. Really good to have their stats are great. Can help gather wood/ berries, kill predators, can carry a lot of weight and deal a lot of damage, good way of getting around fast.
If it won’t allow you to feed it, knock it out and let it wake up then try again. Most likely due to the fact someone else tried to tame it before. Also, it tells you when to feed it at the bottom corner of your screen.