Rugged I have to wonder if you are trying to fish for comments because you are an anti trapper, I've trapped since the later 70's and caught a lot of coyotes, and cats, and the only time I ever seen a coyote pull out on its own was because of a toe catch, that can happen in 2 hours or 3 days, if you are losing them from the shoulder down you are either trying to start something, or you have something or someone, messing with your catches, going to have to say BS to them doing it on their own!