Man, I feel so silly for posting this question. I have 13 chickens that I'm not at all sure of the genders. I've sent numerous pics to the breeder, and one of the ones she was sure was a pullet crowed yesterday. They are now 13-14 weeks old, and a cross of a Black Jersey Giant over New Hamp. Red hens. My biggest problem sexing them is that they ALL have fairly large, RED, single combs. They are just now starting to get curved tail feathers, so I guess I have to wait until they are all in, but I really need to get them gone ASAP. I took one that was crowing to a friend for....eating (I can't do it myself) on Saturday. He'd been crowing for 2 weeks. The DAY after he left, another started crowing. Which is now making me wonder...will they all crow eventually? Why aren't they all crowing now? Does one sort of take the alpha roo role, and none of the others will crow until he's gone? Sounds like SUCH a silly question that I ought to know the answer to, but I don't, and can't find info. on it. Thanks for your feedback!