I had 4 chicks that were 8 weeks old in a wire cage. Last night something killed two of them. The two were lying on top of each other on the cage floor. Both had a lot of their feathers stripped off from their back and chest. One was almost "naked". The other one had a broad superficial scratch on his lower back and a round sort of crater eaten into his upper back down to the bones. Couldn't see any wounds on head or neck but one may have had a broken neck, not sure. The surviving two chicks looked unharmed but were very nervous. What was that? Must have gotten through a 2 cm hole in the wire. Could it have been rats? Or would a weasel have killed that way? Any other predator?