These Three dogs

Three dogs, a Spaniel, an Alsatian and a Great Dane are sitting in the vet's waiting room. They start chatting. The Spaniel, it transpires, caused a fatal car accident, while the Alsatian savaged a paperboy. Both are there to be put down.
The Great Dane had mounted his mistress while she bent over to clean the bath and had his way. "So you're here to be put down too?" asks the Spaniel. "No," replies the Dane, "I'm here to get my nails clipped."