Cross posting also under Ducks for better coverage: "At first googling nothing turned up so I'll research deeper, but starting here. One of my ducks is having some palsy type movements with it's wings. Can you throw a few medical possibilities at me? I'd like to find out if there is anything I can do for it, if there is or will be pain involved, or if it is a communicable disease like Mareks that will eventually result in death. Thanks." At this point I'll also add that after more observation there are three ducks doing this so it's obviously communicable and I'll eventually discover a cause. I'm hopeful it is a vitamin or mineral deficiency or parasite issue but I fear the worst. Can anyone point me in the right direction?