Anyone in need of a good laugh, or least a smile, should look at youtu.be/qqHwV2jBq2Y You've probably all seen it before; it came courtesy of Matthew Webster (Oldie Mag), but it's worth seeing again and again and......etc.
I'm sorry, but I don't find this funny. The dog was called and didn't obey. It's only because he's small that the sheep got the better of him. He was still chasing them and causing them stress. In a bigger dog that behaviour would be called worrying. Dogs should be kept on a lead near livestock.