I have noticed lately that the girls have been staying in their coop more unless the sun is directly ON the run area then they come out to dust bathe and sun themselves... I've notice also that there have been a lot of feathers under the roosting bar... They are 10 and 13 weeks old - are they just losing feathers? or is someone in there pulling them out of themselves or another chicken? We have 5 chickens and I'd say there were maybe 20 feathers under the roosting bar - i find them outside here and there, more all the time. No one has a bald spot or anything, no signs of anything wrong. Is this normal stuff???