Date of Origin: 1920 Argentina Developed By: Antonio Nores Martinez Breed Info: Bred to be a fearless hunter, tracking & catch dog. The breed was developed over 25 years. Breeds Combined: Cordoba Fighting Dog, Bulldog, Bull Terrier, Mastiff. The end result is a fearless and brutal hunter. What it Lacked: Tracking and natural ability. Not useful in a pack setting. Breeds Added: Pointer (tracking), Great Dane (size), Irish Wolfhound (natural instinct), Great Pyrenees (color) & Boxer (human acceptance). Arrived in the USA: 1990, South Texas via Argentina