What else do you have in your flock (males and females)? If he is the only male and there are enough females all should be o.k. but if he is one of several males there will be conflict. He will, during mating season, try to mate with any female, even chickens which can be harmful to the chicken. If he is the only male and you only have one female for him there is a very strong chance he will overbreed with her and injure her. The suggested gender distribution for ducks is one male for every 4-6 females minimum. I have two Cayuga drakes with 14 females and it is a nice balance. There is no competition between the males. I did have one group before that was two drakes with 4 females and the drakes tried to kill each other on a daily basis. So, manage your flock accordingly and good luck.