My Charlie boy and 3 older hens (all RIR) have been together for 3 years now. Last summer I was given a young rooster and a hen (not sure of breed. Both are black with gorgeous feathers and June looks like a polish and lays blue eggs) I had kept both sets in different coops. They would free range and fight occasionally but pretty much let each other alone. Unfortunately the rooster didn’t work out. So my hen June was alone. My neighbor gave me 2 RIR that went into the coop with June and they get along great. I decided I needed to add some more hens into the flock. Purchased 6 young feathered pullets (4 australorps and 2 Wyandottes) and put them in with June and the 2 reds. All is going great. So I decided to supervise and put them all together. Charlie is great with the young ones and the new reds but for some reason is stomping and pecking on my very submissive June. The older reds then come join him in the pecking. So I put him by himself and let all the hens together. Once again all is going good then I add him back and he starts the same thing. I have tried this 4x now with the same result. I would hate to break up the established flock but also hate that Charlie is alone now. Why is he doing this to her and What should I do?? Keep them separated? Just put all the RIR with him and let June and youngsters together? TIA