Look for one in a cave that is stuck in a wall/rock. This makes taming it much easier as it is harder to aggro it. Wear full ghillie armour and feed when promted with broth of enlightenment or spoiled meat
Easiest and safest way to tame this is to lure it under water. They stop aggro and you can tame as you please. Just make sure you come up for air every once in a while. Also be sure the water is deep enough.