I have read many different web sites predator descriptions and I cannot figure this one out. Sometime between when the chickens were locked up last night and when they were fed this morning, one apparently didn't come in last night and was killed. Her head, neck and spine are intact and the head and neck have the skin still on but it's not loose. It's like something sucked the blood out and the skin is sucked up to the bones. My kids said the head and neck look like they are petrified. The body cavity seems to be pretty well cleaned out but it looks like the gizzard (I think) is still there attached. Her wings and feet are still attached and seem pretty much untouched also.