Can you herd ducks?

Amusement

The answer is yes if you have these four border collies working them. Listening to each whistle for direction, they easily herd the ducks through the hoop.
https://www.youtube.com/watch?v=Oyn5t5snmqY

Well Street

This falls into the category of "things I never would have thought of" had I not seen it.

Slipstream

Border collies are so smart. They all knew when to move on what whistle, and each one played their part. The trainer was good too.