The Dogo Argentino or Argentinian mastiff is a large, muscular, and athletic, white-coated dog with an unusual history. Its origin was planned by Antonio Nores Martinez, an Argentinian surgeon, who decided to recreate the ideal hunting and fighting dog, the “Viejo perro de pelea cordobés” (Old fighting dog of Cordoba), a dog said to stem from Spanish Mastiff, Bull Terrier, old Bulldog of England and early Boxer. The fighting dog of Cordoba was described as ‘white, large and ferocious’, so ferocious that they were said to attack their bitches while mating with them. This dog, but with more bulk and superior physical strength, and capable of hunting big game (pumas, peccaries, cougars, wild boars, etc.) was set as the target of the breeding program started by Antonio Nores Martinez. His father, brothers, and uncles were all devoted to blood sports, like cockfighting, dogfighting, bullbaiting, and hunting In Antonio’s mind ‘his’ dog breed would have to be so tenacious, courageous, and tireless, that a single dog, even hurt, would be able to catch a puma or peccary and hold it until his master arrives on the scene to finish the hunt.