That was what I was thinking.This one is a tough call, but I think it is probably a cockerel because of comb size and also by judging it in comparison to your other youngsters.
Thank you - I didn't know that! That is my new nugget of chicken know how for the day!female chickens can and do get spurs, too, and they can be pretty large ones. So the little bump that could appear at 11 weeks where the spurs will later develop can be present in both sexes.