First time poster here. My girlfriend and I have 9 chickens: 7 mixed layer breeds and two polish. Our white crested black polish is about 12 to 13 weeks. She has started at the time to start to crow. Very much sounds like a cockadoodledoo. She is with all females and I know that the females can start to crow in that situation. We are having difficulty sexing her as we are first time owners of polish. See attached a picture of her when she was a chick and a few others are from today and one from a few weeks ago. Any help would be appreciated.