This is how we raise our ducklings. We keep them in a horse stall. We free feed them for the first 4 weeks. Then, we only feed them twice daily, and only out of our hands. We walk into the stall with a bucket of feed, call, "quack quack duck!", squat down and scoop some feed into our hands and offer it. They eat till they are full. Then we do it again in the evening. By the time your ducklings are 8 weeks old, they will be used to running to you if you have a feed bucket and call to them. Then we start letting them out into the barn yard during the day and calling them to their stall at night with the bucket. This makes for very docile ducks that will eat out of your hand for life. At least, most of them. Yes, it is a lot of work, but we enjoy them so much more when they are raised this way.