Is it a baby duck.. Aka duckling? If yes then the first answer is right. If its an older duck and its spring or fall then it is molting. Just like chickens. It should not loose all its feathers to the point of Bald. Some wild drake ducks (males) will molt into eclipse feathers. Feathers just like it … Read more
If its all white, then its a White Crested. Not sure if there are other "crested" breeds.