Male duck attacking one female

[duck513]

I originally had four ducks, two males and two females. They all seemed to get along perfectly fine, the males never fought each other or picked on one specific female. I recently got 7 new ducks, four call ducks(if you don't know are basically miniature ducks) and three new females the same size as the original four. I introduced them and there was a few bites between the two separate flocks here and there but other than that everything was fine. Then one day I go out and find one of the males was what I thought mating one of the new female ducks, but she sounded in pain so I broke up the "mating session". It turns out her head was bleeding and she was limping. I kept her separate from the other males for awhile till she seemed to heal, and tried re-introducing her. The same one male chased her down and started attacking her again. He never does that to any of the other females and the other male doesn't bother her. Is there anyway I can get the two ducks to get along or willing I have to separate the two flocks or get rid of the male? Thanks

 

[Crazy Maizie]

You will have to separate him. There's really no other option except rehoming or culling. You're sure the added ones are all females?

This would get more attention in the duck forum.

https://www.backyardchickens.com/forums/ducks.42/