The Dogo Argentino is a large, white, muscular breed of dog that was developed in Argentina primarily for the purpose of big-game hunting, including wild boar. The breeder, Antonio Nores Martínez, also wanted a dog that would exhibit steadfast bravery and willingly protect its human companion. It was first bred in 1928 from the Cordoba Dog, along with a wide array of other breeds, including the Great Dane. This dog breed is capable of taking down mountain lions. The Dogo is an intelligent and courageous dog with a strong, natural instinct to protect its home and family. Dogos are very social dogs and are happiest when included in all family activities. Dogos make a strong distinction between familiar people and strangers, so it is imperative that they be well trained and socialized at an early age. As in the Dalmatian, white Boxer, and white Bull Terrier, the Dogo may experience pigment-related deafness. Studies have shown that the incidence of deafness is drastically reduced when the only breeding stock used is that with bilaterally normal hearing.