Following. I have the same barred rocks and I bought them at Sutherland's. Nobody knew how old they were, so I'm guessing too. I would really like to know, so I can plan on feeding them the next step up in chicken food!
I need your help too, please. Rosie is 6 weeks old, and up until this point has appeared to be a pullet. I am now noticing that her comb is reddening, and her little wattles are apparent. Should I be renaming her?
Mine are doing the same thing. I think my 5 are a week or two older than yours. I do look up pictures of barred rock hens and they all appear to redden and grow. I know my girls are and they were pullets too! I hope that makes you feel better! I'm a newbie to chickens and these are my very first girls!
The OP's birds are both cockerels. I'm leaning toward cockerel on Rosie also, but not positive. Btw Rosie is a Dominique, not a Rock. note the rose comb.