They won't put themselves to bed but you can easily herd them in. Ours respond to a shout of bedtime.
You need waterfowl pellets or if you just feed chicken layer pellets you will need to supplement them with brewers yeast to get adequate levels of niacin. For ducklings you must NOT feed medicated chick crumb.
If you are getting a breed for the table you won't need to wing clip as they are too heavy to fly.
We keep Blue Swedish - they give a nice carcass by about 20 weeks and they're pretty