Why do you have to give one of them up? Cant you just keep them all? The correct term for a Barred Rock is called Barred Plymouth Rock. So not sure if you are speaking in terms of Barred Rock and Plymouth Rock as a White Plymouth Rock vs a Black? Your Barred Plymouth Rocks are your best egg layer. Id rather you keep them all but id have to choose the California Grey.
have to give one breed of chickens because my dad bought Rhode island red that's why we have no more room for chickens im not going to kill any chicken ill probably give a breed away