I have 2 buff ORP roosters who are very active in servicing my(or their) 6 hens(2 buff ORP, 2 AMER, 2 Red SL). One is clearly more dominant but both will assist the other while servicing. They roost, and run together. They don't seem to fight each other but rough treatment on the girls is showing in the form of worn feathers(bald spots) on the lower backs of a couple hens. Is this acceptable? Any ideas?