That's awful! My muscovy doesn't even want anything to do with my Pekin. She just hangs around by herself most of the time and minds her own business.Sad part is it's humans fault to begin with. When I give away ducks eggs Muscovy or my Runner I always shake them real good so I Know no one is going to hatch them and maybe eventually dump them somewhere. I only give away eggs for eating. In Ocala Florida one year they round up all the Muscovy ducks at a park and killed them all, rescue groups wanted to come in but they wouldn't let them. My Muscovy drake doesn't even mate with my Mallard derived ducks.
When I bought my Muscovy the breeder wanted me to free range it... I told her that I have a fenced in area thats 7000 sq ft and she almost didn't want to sell to me because I wasn't free ranging. I wanted to tell her that breeders like her are the reason why Muscovy get killed because they tell people that they have to free-range them which isn't true!