Hi there - just wondering if anyone knows of a particular predator that will kill a chicken, take it's head and leave the rest? Not too many feathers laying around. We've lost 2 this way just this week. We are in Northern Illinois. I know there are cats, foxes, coon, owls and possum around for sure, but maybe something else we haven't seen yet. One was a rooster that would never go in, the last was a hen - the coop door got left open. Thanks!