I have 3 hens in the same coop. Two Dom's and one RIR. The RIR has what i thought was molt but I've noticed it isn't spreading and her skin is red where the missing feathers are. I put sand in their coop for dust baths and they very regularly free range in our back yard so she takes dust baths often. I have checked her over several times and havent noticed any mites or bugs. The two Doms don't have any feather loss at all! Could it be she is being picked on? What do i do about that? Any help is appreciated. Thanks!