I have 2 german shepherds and a BC/aust shepherd cross. They love to work the horses, cows and goats, and the chickens and guineas, and the kids too! If it moves they're herding it. We just got our big cows and their two calves, and boy are the dogs finding out about protective mommas! The calves want to play with the dogs but the momma cows just want to stomp them. Luckily when I call them(dogs) off they listen. I just yell "OUT" and the dogs head out of the pasture and sit outside the fence and stare. Won't have a dog that won't listen here. It unsafe for me, my family, the dog and the other animals. If I'm having to pay attention to a dog that isn't listening, then my focus isn't on the bigger animals that can do me serious harm.