I have 5 RIR Hens 1RIR rooster n 3 ISA hens. Since the beginning of summer all of my hens have bare backs. I thought they were molting but wouldn't they have thier features by now? Plus I discovered one has an open wound by her wing. Is my rooster doing this? I got them all 11/2 yrs. ago at the same time. Never had a problem til now.