I need help this male is out of control. He bites us for no reason, he is aggressive to my other ducks female Welsh and my male and female Cayuga’s. He’s mean for no reason and I am fed up. I have two ducklings that will join the flock in a few months plus 2 more hatching this weekend, I am afraid he will try to kill them because he’s so nasty. He was great until he starting mating with the female Welsh funny though her first duckling is not his because it’s all black like my male Cayuga so apparently my male Cayuga and female Welsh mated when I did not know it. I do not know what to do about this? Suggestion? Help?