I could use some help ID'ing these three chickens. The first should be a roo as he started crowing the other day, but I can't pin down the breed. The other two definitely look like hens, but I need help with the breeds on them. When I bought the bunch I was told I was getting RIR, barnevelder, americana, and barred rocks. The RIR are easy to pick out of the bunch and can be seen in the background. All were born 8/1/10, which makes them about 18 weeks old.