I have 3 RIR Roos that I cannot keep. I also have one RIR hen that I can ( due to city law ). All 12 weeks. When is the earliest age I can butcher the Roos, and if I buy new chicks and they are ready to go outside, will the RIR hen bother them? I heard RIRs are know for picking on more docile chicken breeds, but wasn't sure only one would make a difference.