"I like dogs better than knights. My father's father was kennelmaster at the Rock. One autumn year, Lord Tytos came between a lioness and her prey. The lioness didn't give a shit that she was Lannister's own sigil. Bitch tore into my lord's horse and would have done for my lord too, but my grandfather came up with the hounds. Three of his dogs died running her off. My grandfather lost a leg, so Lannister paid him for it with lands and a towerhouse, and took his son to squire. The three dogs on our banner are the three that died, in the yellow of autumn grass. A dog will die for you, but never lie to you."
-Sandor Clegane to Sansa Stark (A Clash of Kings, GRRM)