I'd say all the buffs are roos. I have four hens at home all of them 10 weeks old, and none of them have combs that pronounced. Especially the one that has it big enough to lay to the side.
As far as the barred rock, it's either an older girl, or a younger male. Our barred rock roos started getting combs and waddles like that earlier on, but the ear lobes are what make it look more manly to me.
As far as the barred rock, it's either an older girl, or a younger male. Our barred rock roos started getting combs and waddles like that earlier on, but the ear lobes are what make it look more manly to me.