I have 2 young d'Uccle chicks that I'm not sure the sex of. They are about 8-9 weeks old. There is one very obvious rooster and several very obvious pullets and then two that I'm unsure of. The for sure rooster, for reference on comb development: A for sure pullet (the ones I'm sure of have tiny flesh colored combs): One of the ones in question (on the right): Its comb is much smaller and more pink than the for sure rooster. And the other questionable cockerel, I have several pictures of it because he/she would not sit still: The comb on this one is fairly small, more like the pullets but it is much darker than any of the pullets. Your opinions would be much appreciated.