Ducks are pretty good about putting themselves "to bed". If mine are busy enjoying rain or have found a lot of bugs, they may balk at going. I have a stick about 3 feet long—a small tree branch and I use it to guide them. We call it the "duck stick" and it just lets them know where you don't want them to go. You just use it to keep them from turning the wrong direction. I have 5 Pekins and 6 Muscovies. They each go into their appropriate pens at night. I didn't train them to do this, they just did it. The only thing I can tell you is if you are "herding" them, just go slowly and steadily and point them in the direction you want them to go. If you're patient, they just head home and it works well.