Well, of our 2 ducks, they roam freely with our turkeys and chickens. I've never wormed them, (only the other birds) mostly because I've never seen or heard of anything that I could give safely to the ducks. We only have her and a Pekin drake. He's quite aggressive with her. Her feathers on her neck have been pinched off. He's been nasty mean to everyone (mostly humans, but other birds too), since last fall. I hoped that he would get nicer after the "season", but it doesn't seem to be what's going to happen) Lately, I've been keeping the drake in "duck jail", and letting them out separately. Other than that, she's always been happy to eat lots of bugs/grubs/grass, and flock raiser. I'm not sure about molting yet? My chickens really have YET to molt? Everyone is just over a year old in age (except turkey's) Do ducks look obviously funny like chickens do when they molt? I guess I would notice a massive amount of feathers out there, but so far, none of that.