After three years of raising ducks, I think I've run into my first health problem. First, one of my young females, Skylar, seems to be developing her wings improperly. She's definitely a female, but her wings are growing strangely slowly. The quills seem rather greasy. I can't describe the way her wing feels, but it doesn't seem normal. Maybe the quills are thicker or denser, as well. When she walks, her wings are not tucked into the pockets like the others, but they droop. They don't quite drag the ground, but they droop down pretty far. It doesn't seem painful, but she does make a huge fuss and screams when we try to look at her wing or catch her. I'll try to get a picture soon. Second, an adult female, Apple, has a habit of eating the other ducks' feathers. During every feeding session, she will reach over to the closest duck, pull out one of the small under feathers, and eat it. She only does it once or twice a day, seemingly always only at feeding time. None of the other ducks exhibit visible feather loss. She's been doing this for several months. I haven't been too worried about it because it hasn't seemed to be a major problem. What's going on? What's causing it? Is it treatable? If so, how? My only guess is protein insufficiency. They eat wheat and sorghum and very little commercial feed (occasionally we give them some layer mash, meant for chickens). They also forage free-range (they used between one and three acres of our property) and find a lot of their own feed. Sometimes, when we have a creek after heavy rains, they find minnows and small fish. We give them vegetables and other tidbits from time to time.