My RIR pullet (the NHR too) is totally dominating my poor little SF. The RIR and NHR pullets are ten months old and the SF is seven months old. They’ve pulled out half of her beard and mount her like a roo would. My seven month old BLRW cockerel is pretty good about breaking up the mounting incidents, but he doesn’t seem to notice the feather pulling (which they also do to an EE pullet). Is there anything I can do other than separate the two “mean girls?”