We have a BLR that we purchased as a pullet along with 2 BO's and 1 Easter Egger. They were all close in age but the BLR was always bigger than the rest. I had assumed that it was a little older. We have had them for 11 weeks as of today. They were around 10 weeks when we got them. But lately I am starting to worry that the BLR is a cockerel. Its comb has not developed that much but its feathers are changing and look different from all the rest. We are new to chickens so I need your help please.

