i have three Roos that I can tell right now but only one crows. He is considerably older than the other two but they should be crowing now as well. Is it a dominant thing that the other two won't crow? Also, this older roo has starting attacking my two younger kids , 3 and 18 mos. is this an aggressive trait that I should eliminate? Or does he just see them as a threat cause they are the same size as he is? I would rather not have to move him to the freezer but kids safety comes first.....