It's not really Styrofoam, it's the blue sheets of insulation around the bottom of the trailer we live in. The chickens will *not* stop pecking at it! It adds nothing to the decor of the front to have a ladder lying up against the place to keep the little monsters from getting at it. The damage you see in the pic occurred in about a half hour one day when they first discovered the stuff. And it can't be good for them. How concerned should I be about them eating it? Suggestions to keep them off it when the weather breaks? They are not in a run, they leave the coop and can go anywhere they like.