I may be jumping the gun, but I think my Buff Orpington is a boy. The chicks are 3 weeks old now and he or she seems to be developing more color in the comb than the others. He or she is also the designated protecter of the other three, always circling them around and ready to check out new stuff first. Here is the picture, one is a close up of the comb and the other is my Delaware on the left and the Buff on the right, they are the same age. Sorry for the picture quality, it is a crappy cell phone camera and I hope to get better pictures soon. Thanks for your help!