Aha! What villains are these, that trespass upon my private lands! Come to scorn at my fall, perchance? Draw, you knaves, you dogs!

Kill me then,' panted Harry, who felt no fear at all, but only rage and contempt. 'Kill me like you killed him, you coward-' DON'T-' screamed Snape, and his face was suddenly demented, inhuman, as though he was in as much pain as the yelping, howling dog stuck in the house behind them- 'CALL ME A COWARD!

Oh, for heaven’s sake, Sirius, Dumbledore said no!” A bearlike black dog had appeared at Harry’s side as Harry clambered over the various trunks cluttering the hall to get to Mrs. Weasley. “Oh honestly,” said Mrs. Weasley despairingly. “Well, on your own head be it!” The great black dog gave a joyful bark and gamboled around them, snapping at pigeons, and chasing its own tail. Harry couldn’t help laughing. Sirius had been trapped inside for a very long time.

Severus, please fetch me the strongest truth potion you posess, then go down to the kitchen and bring up the house elf called Winky. Minerva, kindly go down to Hagrids house where you will find a large black dog sitting in the pumpkin patch. Take the dog up to my office, tell him I will be with him shortly, then come back here.