I am wondering. We took in a couple of what turned out to be Roos from a neighbor, but they appeared to be 12-14 weeks at least when we got them 6 weeks ago. One of them just started crowing yesterday. Its fine we needed the boys, but at what point can you tell boy or girl? Were they way younger than they seemed when we got them? I ask mostly cause I have my chicks growing and need to start deciding which of the 24 are boys so I can plan for who we keep.