I have 2 batches of chicks. One is now 16 weeks old, and the younger is now 12 weeks. The younger batch contains 2 roos (out of 6 birds) and the olders are all hens (I hope!) - 9 of them. However, one or two of my older girls have begun to crow in the mornings. I had read someplace that sometimes hens will act like roos if there are no roos around. Has anyone else ever experienced this? I am really hoping that none of my girls are really boys!