I was out in the coop yesterday, hanging a new/bigger feeder, as my chicks are growing enough that the two smaller chick feeders were just not enough. As I was working, I was watching their behavior and noticed a few of them standing somewhat off to themselves, stretching their necks as high as they could, and flapping their wings vigorously. Some of these were smaller, with one that was much larger. Would I be correct in assuming that these are probably roosters? They are Black Australorps that were born around May 1st.
