Opinion please: A new development is being built right next to the area I live. Foxes can be seen hanging out there. I have all my pens inside of a 6ft secure privacy fence in my backyard. Will a fox hop a 6 ft fence to get to my pens. Are they good at breaking into pens? I have the bottoms secured so nothing can dig under but they might find a way through my door. Anyone here think foxes are a threat to my backyard flock? Should I worry? A simple answer will do. Nathan