my chickens are picking at each other .they started just above the tail and now one of my blk astos has a bare red butt
and belly.I have checked for mites and don't see any.they started this when the yard was full of snow so I thought boredom they are now back in there area and they are still picking each other.It could also be a protein problem.but i don't want to give them cat food.I'm trying to keep them vegetarian.I feed them 16% protein layer mix.