I have 12 hens in a 12x12 pen. They eat 20% layer and 2 handfuls of hen scratch everyday. They are picking each other's feathers, acting aggressively toward each other and the egg eating just started two days ago. The only cause I can think of is boredom. I can't let them out to free range any because of our dogs. Would putting a flock block help to give them something to peck at other than eggs and themselves? Any other ideas appreciated.