Sunday night I put 38 chickens and 4 guinea keet down in the chicken coop where I have 7 chickens already. I noticed Sunday night there were a few out so I plugged off the hole and closed them off for the night. The chicken coop is built off the lean too and that is where I found them. Monday I worked real late and didn't go down there and Tuesday I found 8 dead with just their heads removed from their bodies. I found the heads and birds and they were all in small areas. The other 18 are missing no traces of them. I set 5 live traps and made 3 weasel traps and it has been days without an attack and haven't caught anything. What could have done this?