One of my ducks had a hump on it's back since hatching. A few weeks ago I noticed it was causing wing development issues. Looked similar to Angel Wing I believe. I took the duck to a wild life rescue to check out. They felt around, said they'd never seen anything like it, but it was just made of skin. Bones were fine. They kept humpback for a week. Now the duck is deformed looking. Crooked? Like tail/butt goes to the left. Looks shorter somehow. Before the duck looked normal except for the hump, and hanging wing. Personality is great, above average I'd say. Humpback is physically in good shape. No problem doing anything, including flying as of a few days ago! What I'm wondering is if it's a bad idea to allow breeding. If it is, then I might consider getting a diaper and having a house duck. Or if you guys think it's genetic, and there's another way to avoid breeding without diaper ing let more know please. Btw, two things that may be relevant: 1) I can't tell what sex it is. Unlike the other ducks, it doesn't quack. It makes a sound similar to someone with asthma trying to get oxygen. 2) A few eggs needed help hatching. I'm 99% sure four of them would not have hatched without help. Three of them didn't make it still. I think humpback might be the fourth..*might* It's impossible to get a good pic of the hump. I've been trying for weeks. But you can see it looks all contorted.