So I had a pekin duck named Milton for a little over a year and he was aggressive in the past four months that we had him. We had gave him to my brother because he had 25 chickens a female duck named Angel. Ever since he was with Angel he has been super aggressive he will attack by biting your feet/toes etc. (MILTON WAS NEVER ABUSED BY MY BROTHER OR US WE ARE COMPLETELY AGAINST ANIMAL ABUSE!!!!) Anyway, my brother saw him then mating a cpurple days ago. Whenever my brother tries to get the chicken eggs out of the nesting box Milton runs into the coop to attack my brother. Ever since he saw the mating he's been even more aggressive. Milton fights a lot with the chickens and Milton has scratches all over his beak from the chickens but Angel does not have any scratches whatsoever. He is so aggressive now that my brother wants to get rid of Milton just because of his aggressiveness towards us his wife his kids in the other chickens. Why is Milton so aggressive since he's been with Angel? Can someone please please tell me why Milton is like this!?