This just kills me to post this, but I do need the advise asap. Yesterday a hawk attacked my silkie roo, my son saw it happen & scared the hawk off & away. Both wings are broken on the roo, he can't hold his neck up & he flops around (like a fish out of water) every once in a while. I could not see any other injuries, other than the broken wings, but there seems to be internal injuries, he cannot see, nor swallow. I need to know how to put him down since he is in obvious pain. I cannot use a hand gun ( I live in an residential neighborhood ) but I do have an air gun, will that be sufficient? I do not know how to break a chicken's neck & fear that I might mess it up, but if someone can post on a sure obvious way of breaking the neck quickly, I will consider doing that. Thank you.