I own four ducks, two pekins (One duck and one drake) and two mallards (both ducks). One of the mallards goes to the fair each year, alongside our pekin drake (who is beautiful <3). But, recently, the drake has gone duck-crazy for the mallards. He picks on one of them quite a lot, and it's gotten to the point where I need to separate the mallards. The mallard he doesn't stop jumping on has a bare patch on her back and head. I know that mallard (and those related to it) drakes have similar behaviors outside of captivity, but is there any way to prevent this and keep them together? The pekins are about 10 months old, the mallards are almost 2 years old. They have been together for five or six months, but it's never been this bad (usually he would chase them for a few seconds and give up. Now, the mallards give up right away, and he never leaves them alone.). Thanks a bunch!