I have five d'Uccle chicks that hatched May 5. Up until yesterday, I was guessing two of them were little roos based on their comb development: the combs of these two chicks are bigger and already red, as compared with their three same age siblings. But yesterday I noticed chick no. 3 starting to get a red comb. Another little roo, or an earlier maturing pullet? I know I'm going to have to wait to see for sure, but I'm anxious. We so wanted more d'Uccles, and we can't keep the roos!