We have found 1 or 2 chickens dead each night. First it started on the ones that wouldn't go in the barn but roosted outside. It would take off the head but leave the body. Sometimes we would find the head and sometimes we wouldn't. Then, we made them all move inside and something still went in and killed some. I can't even find a mark. We have set live traps, huge rat traps, and put out poison. I have checked for holes in the chicken house but it is an old barn we have fixed up so there seems to always be hole somewhere. Does anyone have any suggestions on what it is (we think maybe a weasel) and what else we can try. Loosing chickens becomes an expensive ordeal (and stressful). Thanks for any words of wisdom.