Was hoping if you guys could help me out. My blue EE, Dipper, seems to have horrible personal hygiene - her beard and muffs are stained brown and her feathers seem to have a gross dusty coating on them. Their coop is spotless, their run isn't dirty and is late enough for 10 chickens and there are only five, and they have two dust baths to choose from. But she's still grimy. Is there any reason for this or do I just have a dirty chicken? What can I do to help?