Barred rock. Roos?

[Wyandottes7]

They look like cockerels to me.

 

[Rhodebar Lover]

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?

It would be helpful to start your own thread so we know which bird is being talked about, but he appears to be a Dominique cockerel.