Below are photos of my 3 BRs and 1 who has been deemed a Black Sex Link pullet by a gentleman from USDA and another from Penn State. I am thinking that I have one Roo here, as one of the BRs is definitely lighter and is developing a comb. The issue is that I began with a total of eight, four of which already had combs this size at 4-5 weeks and were even lighter. This one has kept me confused for some time and has just recently (in the last two weeks) had major comb development. I'm thinking he's still a roo, just slower to develop? Also, the feathering on the tail area of the "BSL" has me concerned. Is this a pullet??? From the info I was given, it sounds as if the black color means it is a pullet by default. The guy I bought these from had BRs and some RIRs (kept separate), but I think someone got mixed up creating my chick! Any help would be greatly appreciated!!!