this sounds horrible. we have to ducks and four chickens. i love my ducks but one of them is picking on my chickens. they were fine for several months together. but my rooster got hurt and is disabled now. ever since then my duck tries to pin him down and has started picking on the other chickens as well. i have tried to secluding them but we can tell it is affecting the ducks quality of life. we have decided to try to find the duck a new home. any takers?