I have my first ever flock, we kept one rooster out of all the chicks I raised. He seems really sweet so far, does a dance for his hens, does a squat when I pet him, will let me pick him up and generally is a gentle boy when mating with the hens. He's fine around humans and our dogs currently. All birds are all around 6-7 months old. He's the only cockerel in the flock so bo competition. I've heard roos can become aggressive suddenly. What age range does this tend to happen? What behaviours are early signs of a potential problem/aggressive roo/cockerel?