Our three 9 month old drakes, 2 pekins and 1 mallard, used to concentrate all their mounting efforts on one hen. We gave that hen to a neighbor to keep her from being constantly harassed. Now they've turned on our other 8 hens. They don't care which one it is and they ALL try to mount their target at the same time. It's gotten to the point where they don't do anything else all day but stalk the chickens and occasionally will turn on each other. They've become absolutely ridiculous. They're going to end up killing a chicken. We have them seperated in a pen but the chicken coop is in the fenced in area where the ducks are and the chickens can easily jump over the low fence to go lay but the ducks are there just waiting! Is there any way at all to break them from acting like this?? I've already put an ad on craigslist.