The Pyrenean Mastiff is a breed of dog that is believed to have descended from molosser dogs brought to Spain from Sumeria and Assyria by the Phoenicians around 3,000 years ago. These molosser dogs developed into several livestock guardian breeds in the region including the Pyrenean Mastiff, Spanish Mastiff and Pyrenean Mountain Dog (also known as the Great Pyrenees).
The Pyrenean Mastiff and the Pyrenean Mountain Dog are the closest related breeds, with the former originating in the Aragon region of Spain and the latter in the northern French-controlled area of the Pyrenees Mountains. The Pyrenean Mastiffs were used as livestock protectors during the Trashumante, a mass migration of flocks from grazing grounds established in the 5th century.
During this migration, herds of sheep were accompanied by a shepherd and five Mastiffs, who would protect them from bears and wolves. These Mastiffs known as the Navarran Mastin and Mastin d'Aragon were highly esteemed and even received special food allotments. They wore spiked collars called carlancas to protect their necks during confrontations with predators. This migration practice continued until the 18th century.
In 1659, the Pyrenees Mountains were split between French and Spanish territories. The French further refined their Mastiffs resulting in the development of the Pyrenean Mountain Dog a white, longer-haired breed with a more refined appearance. The Pyrenean Mountain Dog gained popularity and recognition through strong breeding programs.
Meanwhile, the Spanish Mastiffs in the southern region remained primarily focused on their work as livestock guardians. They continued to be larger, more primitive and less homogeneous than their French counterparts.
In the 1930s and '40s, various factors almost led to the extinction of the Mastiffs of Aragon. The disappearance of wolves and bears from the Pyrenees, the shift to rail transportation for sheep, the Spanish Civil War, World War II and scarce food supplies all contributed to the decline of the breed. However, with the return of wolves to the Aragon region in the 1970s, there arose a need for the Pyrenean Mastiffs once again.
A small group of enthusiasts worked to revive the breed by locating approximately 100 specimens that closely resembled the breed standard and exhibited the desired temperament and good health. Through a selective breeding program, they were able to preserve and improve the Pyrenean Mastiff.
The modern Pyrenean Mastiff is known for its large size, strong build, graceful movement and gentle temperament. While it retains its fighting skills from centuries of guarding livestock, it only resorts to aggression when necessary to protect itself, its people, its flock, its pack or its home.
Although still relatively rare, the Pyrenean Mastiff has spread to various parts of Europe, Scandinavia, Russia, Australia, Japan, Mexico, the United States and now Canada. The breed's population is estimated to be between 4,000 and 6,000 worldwide.
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