Our chickens are looking really ratty. They have lost a lot of their feathers and have red irritated skin especially at the end of their tails. One has it around her eye. It looks really irritated and red and really dry. I'm lost! It almost looks like a bad case of eczema. They had Northern Fowl Mites but we treated them for that and haven't seen any sign of them since. Any input would be greatly appreciated.