The Córdoba fighting dog (Spanish: viejo perro de pelea cordobés) was a type of dog indigenous to Córdoba, Argentina, that resulted from crossbreeding old mastiff types of unknown pedigree.

They were purposely bred for the sport of dog fighting until the early 20th century.

The Córdoba fighting dog was a dog type originating from Córdoba, Argentina utilizing Spanish Mastiffs, Bull Terriers and early Bulldogs brought to South America.

[1][2] In the 1920s, Antonio Nores Martinez and his brother Agustin were inspired to develop a dog that could hunt wildcats, boar, fox and other vermin that were harmful to the region's agriculture.

[3] Over time, Martinez developed a new breed of pedigreed dog by repeatedly crossbreeding the Córdoba fighting dogs with modern breeds of dogs that were internationally recognized, such as the Boxer, Dogue de Bordeaux, Bulldog, Pointer, Bull Terrier, Irish Wolfhound, Great Pyrenees, and Great Dane.