A remote-controlled car with a flag on a pole can herd cattle
https://www.newscientist.com/article/2342409-a-remote-controlled-car-with-a-flag-on-a-pole-can-herd-cattle/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
A remote-controlled car with a flag on a pole can herd cattle