Hi! I'm really struggling on this topic. I currently have 3 - three year old RIR and 4 - 2 month old Americauna's. The RIR's are in a 4x4 coop. The Americauna's are still on my back porch in the brooder, but I am ready (SO READY) to get them outside in a coop and off my porch. My original plan, was to keep them separated until they were all the same size and then have them coop together in a larger 6x8 coop and use the small coop I have for additional flocks or sick birds as the farm changes. But, the delimma came up when I started getting prices to have this large coop built. I could just go buy another coop, identical to the one we have, and keep the RIR and Americauna's separated, but sharing a 20x10 run. OR I could get the larger coop and house them separately, until they are the same size and then merge them all together, when the time is right. So, are there benefits to having two small coops versus one large coop? No matter what, the two sets of birds will not house together until older. They will share a run regardless. Thoughts?!?