I haven't seen them try, and I do let them romp around outside from time to time. I don't get to take them outside as much as I want because it's been raining a ton recently, but I let them swim around in the tub for 30 minutes (or more) a day and I play with them all daily for at least an hour...
One of my 5 black east indie ducklings has a bald spot near both eyes, and it's thin around the eyes themselves. It's not raised, and there are no sores but it's very obvious. The duckling seems perfectly healthy (eating drinking playing and swimming as normal). They stay inside so I wouldn't...