I have noticed my cockerels being rough with my hens. Started seeing feathers missing on the tops of their heads and scabs in their combs from them (presumably from witnessing mating) then I started to notice some of them are missing feathers in odd spots. Their necks the front and sides (I did see this particularly bird get pecked there). I then saw the same bird peck another hens back. My birds have a dust bath with peet moss and DE. They also get apple cider vinegar from time to time in their waterer. They get locally grown organic grain and vegetables/fruits almost daily. I had only introduced two hens about 1 month ago and one of them had some back feathers missing and I was told and presumed this was due to her being a roosters favorite. Anyone have any idea what would cause beck feathers back feather And head feathers missing ? Thanks in advance guys.