I'm beginning to wonder if I have a predator prowling under the coop more than I realize. We have this giant Rubbermaid tub pushed underneath the backside of the coop and when the girls kick apart the strawbales too much, I put the straw in it. Today, I for some reason pulled it out from under the coop and there was a nice deep impression made in the straw that went all the way to the bottom of the tub, almost tube-like, where something had curled up to sleep. I'm hoping it was just a stray cat hiding out in a warm place for the night and not something worse. Good luck with your fox elimination.