Cerberus

In the short story The Capture of Cerberus, Cerberus is a large hound belonging to Countess Vera Rossakoff. He guarded the entrance to the "Hell nightclub" which the Countess had set up at Temple Bar in London. Cerberus was well trained and absolutely devoted and obedient with the Countess who called him "Dou dou". However he could be aggressive and function as an attack dog on command.