My Shelbie (RIP) kept our Dalmation in line, she would take his treats away from him, and stand by the food bowl daring him to come near. If he disobeyed her in any way, she would bite his butt. He used to run from her so fast while she was chasing him nipping his butt that his hind legs looked as if they were passing up his head. It really was funny to watch because Scooby could have bit her head off, but he always was way too scared of her.