Has anyone ever had a duck that flips over on its back and can't get up again? I have a 2+ month old buff drake who has periodically been found upside down - and unable to right himself. (Think turtle, horseshoe crab...) At first I though he was stuck to something, or a wing was hung up on something that made him unable to flip over, but now it appears to have become a habit. When I right him he runs off looking stiff but otherwise normal, then he somehow ends up upside down again! I haven't been able to catch him flipping over.