I have a small Rhode Island Red hen, her back and tail have almost completely been striped of feathers. I notice feathers starting to grow back, but then they disappear. She is very small for a RIR. I've noticed a lot of my hens are starting to miss feathers on there back down by the tail. Do I have a feather picker? I keep checking for mites and lice, but can't seem to find any. Should I invest in saddles for them. Do they really work? I have seen my small RIR pick her feathers on her own neck, could she be doing it to herself? Any help would be appreciated. Thanks