Cassie is two years old and although the smallest of the flock she has always been the best layer, a hardy little gal who wanders the neighborhood. Several months ago her feathers started falling out, and I assumed it was molting. But it hasn’t gotten better and seems to be deteriorating. I haven’t noticed excessive or abnormal scratching, and her one remaining flock mate looks as pretty as ever - not a feather is out of place. They both take tons of dust baths and their combs and waddles look bright and perky. I’m adding a few pictures - can anyone tell me what this might be or what I can do?