My RIRs will be 4 weeks old tomorrow. I have a suspicion that I have more roos than pullets. So I am contemplating ordering 3 Buff orps and 3 black Australorps all girls to make sure I have enough girls. My RIRs are in a brooder outside in the shed. It's pretty big. If I get these new chicks, do I have to keep them in a separate brooder? How soon could I introduce them to the RIRs? And what would be the best way to do that? Thanks Here's one of my RIR babies.