We have a lot of cats, but they are to big to fit through the dug whole we found. We suspect that it was a fairly small cat, or possibly a opossem.The silkie that was killed was about 4 -5 feet. His sister is alive, but i think she is scared for life by that experience. The silkie could of fought back but this was a rooster.And when silkie roosters don't cockadoodle they love their farmers.Please tell me what it could be, another silkie depends on this answer.