About 3 weeks ago, we took in 3 ducks for the winter (1 male and 2 female). I already had 2 ducks (Pecker and Daisy). They are both Pekin Ducks. We kept a baby gate up to keep the new ducks separate from our ducks until they all were able to get along. It took 2 weeks or so until they all got along and we took down the baby gate. Now, Pecker is all over one of the new females. We call her Twitch, she is also a Pekin duck. Anyways, he is so rough with her that she has feathers missing, bruising and swelling on the back of her neck. I have never seen him this rough with Daisy. What can I do to help him lay off of Twitch? I don't want to have to keep him separated from the rest of them, but will if that is the only option. I was hoping that maybe there is something to give him to have his hormones chill out or something. At the end of the day, Twitch is so exhausted that all she does is lay in the corner and I feel so bad for her.