If you only get two hens it's good to get them the same breed. I've had both BRs and Dominiques. Doms were the foundation stock in BRs breed history and then bred larger by infusing with game birds and other LF. Doms have a long Colonial history, are active foragers making other breeds look lazy, calm-natured, dual purpose (cockerels), good layers in spite of taking time off to brood their own young which BRs are not known broodies, and Doms are easier on the feed bill than the larger BRs. As chicks both are outgoing, curious, and people friendly. However as the BRs mature they can get pushy in a LF flock where the slightly lighter weight Dom is less political - not docile, but not usually mean either. This is just our experience but whatever your decision it's good to keep both pullets the same breed. Many people love their RIRs for eggs but they are large birds and not easy on the feed bill. APA Ameraucanas are good egg layers and not usually broody, active foragers, predator savvy, have good temperaments, lay very large to XL eggs, and in pretty blue. It's all a matter of what you want. The larger the breed, the more space they require not to get on each other's nerves LOL.
