:thumbsup That is what we like. And could be, mine do seem a bit grumpy when molting. Some of mine are still in molt my Muscovy's have barely begun. But we have to also take into consideration hormones are probably wacky this time of year all winding down from summer. Spats will happen just...
Try it, all you can do is try. If Trooper is the instigator giving her time out is a good idea but it must not be making an impression if she starts picking on the others again. I'd have more than one feeding station with water so everyone can eat, put them across the pen from each other...
Do you have more than one feeder out? that may help. Maybe put Trooper in her own space like you have been doing and add the other females to her side and see what happens. To break up a dominant ducks behavior you need to knock her down a peg and sometimes taking them out of their comfort zone...
I would honestly add more ducks, as GQ says they are flock animals and they really need each other, ducks are hormonal and Muscovy's are the leader of the broodies in the duck world, I have 3 sisters who are broody right now and have been most of the summer[by the way they aren't even sitting on...