I have 2 Doms - a hen and a roo - that are about 7 to 8 months old. The hen is laying an egg every other day. I started out with 5 Doms but 4 of them turned out to be roo's so I got rid of Moe, Larry, and Curley and kept Ralph and Alice. I would like to have more eggs and I know of someone near me that has RIR's that are about a week old. Can I get a couple of them and add them to the coop? I am worried the roo will try to hurt the younger chicks or the hen for that matter. Any insight will be much appreciated.