that is a tuff one. I would use a gun to make sure they were down right there. I can only imagine the headlines if they were to somehow get out of the woods and be found with a broadhead in them. I would have a hard time doing it as I am a dog lover but in the long run you would be doing them a service. Domestic animals just don't have the ability to make it in the wild. That is why they attack other pets and chickens and what have you.