How to Kill: Approach from its behind while crouching, and when you are close to it while it is sitting and resting, start smashing its head with a strong weapon. Because it has a higher health bar than the deer, so it won’t die to a weak weapon that easily, then it will run away faster than you. Or again you can try to headshot it with ranged weapons, but not with stone arrows, it won’t one-shot it.