This may sound a little cruel but the way I dispatch alot of my coons is to put a catch pole around their neck then they get a couple hard stomps right behind the front shoulder and then I usually stand on then with my full body weight for a minute or two. No blood and no mess. Makes carrying them out and skinning them alot less messy then shooting them in the head. If I need to make a quick kill say along a road or close to houses then I shoot them in the head with a pellet rifle. It works really well and does not make much noise.