Same thing has been going on her stony, I think mamas are just very tempermental right now and it doesn't take much to set them off. It's gotten some better now because 2 of my broodys have gone back to just being hens. They still round their babies up in the eve. but pretty much they leave them on their on during the day. Last eve. went into count heads and 2 of the 3 week olds were sitting on the roost and being picked on couldn't figure out why they weren't with mama she was in the nest box sitting on an egg. silly goof! so i took the egg and gave her her chicks all got settled down then.