I have 5 chickens. The youngest of the bunch the others have protected till now. She has become very agitated and started brooding, even on now eggs. She stays in nesting box most of the time but when she does come down to run she runs around like wild. The other chickens have started fighting with her. I don't know which started first, her crazy or them fighting. I have crated her for safety and to stop the brooding. She is still noisy in crate and has her feathers ruffled. What should I do