I am absolutely new to this raising birds thing, let alone raising chickens. So far, my chickies have been great: they're growing, chirping, eating, scratching... everything I think chickies should do. They are just about 4 weeks old. I just noticed that my buff Polish is nearly naked around her neck and in between her shoulders... should I worry? I know they begin looking ragged at this age, but the others don't look nearly as beat up as my poor Polish. Besides the feathers, she seems fine... eats, drinks, and is active. I thought it might have something to do with space, so I just doubled the size of their enclosure. Besides that, I'm at a loss. Any thoughts or tips would be greatly appreciated!