This is Chip and Buddy driving one of our cow herds to the barn for vaccinations.  Both are ABCA registered Border Collies and really enjoy working cattle.  There is about 40 head of pregnant cows in this herd.  Chip and Buddy gathered them from the pasture and pushed them all the way to the barn, with just voice command and hand signals from me.  William and I ride the Gator; the dogs do the work.