Did you try putting them next to the new ones on the roost after dark? When they wake up together in the morning they often do better. Watch them and any that fight too much, take out until the next night. Keep doing this until they get along.
Val, you are great, and I know you care so much.. My problem really, is I have spoiled the other hens so much they feel that a new hen is interloper and distracts my attention away from them. the word jealousy comes to mind!Did you try having them in an adjacent run for a while first? That works better here, although there is always a bit of pecking while the boss ladies teach the pullets who's in touch.