We've kept ducks for a while, and one thing that has always impressed me is that no matter how much time they spend in the water, they never appear wet. I noticed that yesterday, my ducks were wet, particularly on the backs of their necks. As in, the individual feathers were obviously holding water and they looked kind of scraggly. We had a downpour for a short time, but still! They're Ducks! "Like water off a duck's back!" My first thought is that somehow they are suddenly not able to properly oil their feathers. Why would that be? No diet change per se, though they've probably had more spring grass lately. Other than that, the ducks appear happy, healthy, and active.