My son got an egg from our chicken tractor at about 4 p.m. We ran out to do some errands and got back home about 5 p.m. I went out to feed the chickens and noticed Whiskey was missing. I checked the nesting box first, thinking maybe she was ready to lay. She was in the nesting box, beheaded. Her neck was all exposed, as was her chest, but her body was complete. There were a lot of feathers around. The nesting box area of my chicken tractor is tiny. Small ramp up, opening just big enough for a chicken, and only about 16" tall. What would do this, in such a small area, in broad daylight? I'm in east TN.