Now available at the St.Louis city dog pound – Quentin, the dog too tough to die. Quentin is believed to be a basenji, a breed of dog that does not bark. He is the first dog to survive a trip through the pound’s gas chamber and walk out. Seven other dogs put in the chamber with him all died from the high-density carbon monoxide was pumped into the chamber. He’s a 30-pounder. His previous owners took him to the pound when they moved into a place that does not allow dogs.