Seconding, or thirding, Fred's Hens suggestion. Be sure your hatchet is really sharp, and that you have a way of holding the bird securely, AND that you strike against something good and solid, like a hard stump (not soft ground or gravel!) - that means of dispatching your bird is the surest thing and surely easiest for your hens. Learned the hard way, sorry to say, after several alternate - and often promoted - methods.