We have 8 Australorps and 1 buff Orphington. We were given an Asian Blue hen 6 months ago. All the chickens are full grown and all hens. The Asian Blue is pretty wild and other chickens have always picked on her. The Asian Blue had some feathers on her back missing when we got her. At one point, most of her feathers grew back, but now her entire back is void of feathers with some tail feather missing. Could she have lice or it it just the other chickens pulling out her feathers because they don't like her?