My poor drake last winter slept under the roost and got pooped on too so I took pity on him and made roost shelves so now him and the other ducks can sleep under the roost And not get pooped on. As for cleanliness my drakes have never looked like that. Yes their feathers can get pretty beat up usually from fighting up against something like a fence, but your drake need something Nutritional maybe start adding some extra protein to his feed. And give him plenty of water to bath in if possible. Bathing means preening which will help those feathers. Maybe try adding some cat or dog kibble to their feed for extra protein Good quality though nothing cheap that is mostly fillers. Feather quality needs a good protein and when did he molt last? Please I am not saying your not taking good care of him he is just needing some extra nourishment to get him sleek and in good shape. White Muscovys seem to have more feather issues than their colored counterparts. I had 3 white females when I first started with Muscovys and their feather quality was much worse at times of the year to where by end of summer all three had wet feather. Then they would molt in the fall and look great for a while and it would start again so evidently they just need a little extra nourishment to keep up.