Curious how early one can tell if there is a rooster in a bunch of new chicks. We have 8 chicks that are about 10 or 11 days old. One of the BO's is slightly bigger than the rest and is a little more curious than the others. S/he is the first to come to the door of the brooder when I come to check on them, change water/feed, etc. You can see the slightest hint of a comb starting to form, also, where the others, both the BO's and BR's, have none yet. Any thoughts on whether this girl might really be a boy? Supposed to be all hens, but I know people make mistakes some of the time.