We're new to chickens, purchased a few sexed Ameraucana chicks thinking they were all female. Well, yesterday at about 18 weeks old we heard one crowing. We were really surprised. Now, I expected she was always dominant as she always led the pecking order and is the ruler of the coop. However, wasn't expecting it crow. There is no comb or waddle on this guy, but he is a bigger bird than one of the other Ameraucana's we have. Is it possible for a dominant hen to crow? Here he is, doesn't look like a rooster, but definitely sounds like one.