Who let the dogs out?

I pull into a stop as a woman and her Rottweiler are passing the bus. The dog suddenly goes crazy and starts barking hysterically at the bus. The woman loses her grip on the leash. The dog beelines it to my front bumper and starts gnawing on it. "Ma'am, your dog is attempting to eat my bus" I say. "I know! Isn't it cute? He's just protecting me from the loud, noisy bus" she replies. She then starts talking to the dog in a baby voice. By this time, the rottie has just about torn the bumper off and I'm starting to get a little bit frustrated. "Ma'am, get your dog off the street and away from my bus NOW!" I tell her. "Well aren't you a grumpy bus driver?" she says as she pulls the dog away and gives me the finger.