I have a beautiful avery connected to my chicken coop that we decided would be perfect for breeding our hens. My fiance is putting up walls to create numerous pens within the avery. My question is...how long do I keep the rooster and hen together before i can expect pure breed eggs? I have an assortment of roosters and hens that free range but I would like to take my best barred rock and mate her to the best barred rock rooster and so on, and then hatch those eggs under a broody. Any other suggestions about mating?? Thanks!!