I have 4, 2 year old hens that have suddenly stopped going into their coop within the last week. I can't figure out why. There is nothing in there that I can see. They also seem agitated throughout the day and one keeps getting out. We have also noticed that within the past week, the few eggs that are being laid are being broken and eaten. I can't figure out what is going on. It's not a new coop. They have been in it since last fall. We have not added any new chickens since last fall. They have all been using the coop since we built it. I am not sure what is going on!! Help!