Hi guys! I am new here, but I have read a few of the aggressive male threads and need some help! *backstory* Easter 2015, I raised 6 ducks. 4 mallards who all turned out to be males and 2 pekins who were 1 male and 1 female. A few months after putting them outside, the male became very aggressive and targeted one mallard singularly. We rehomed him and put ducks got along very well. Our female produced one egg a day for us. fast forward to Easter 2016, we wanted to expand our flock and maybe get another layer. We adopted 2 baby pekins who turned out again to be one male and one female. *current issues* Once the new Pekin male matured, our old Pekin female stopped laying. Our new Pekin female has never laid an egg. That is a problem, but the more pressing matter is that our new Pekin male is being aggressive! He chases down a single Mallard and sits on it while pecking at its neck like he's trying to kill him. It's worst at night, and I'm not sure what to do now. Can anything fix this behavior? Is it normal? My ducks are not very friendly. We don't handle them at all since putting them outside. They run from us in the yard and only approach us (cautiously) when we are feeding them. Any advice or help would be much appreciated!