help! my biggest and most fiesty girl is losing her feathers on her belly...long bare patch...and from her butt/tail. she's top dog, so no pecking on from other girls...she's laying fine, looks healthy other than that...but did notice what i think was a worm in one of their poops. suspect it was hers...what do i do? the patch is right where she roosts. im a fairly new chicken owner and man do these chicks keep me up worrying!! help!