The dogs are known man's best friend, but they can also help us in society as guardians or even drug traffickers and that is why I will mention the bravest races. You know what to do when you see one of these loose on the street ...;)
Fila Brasileiro (also known as Cão de Fila and Cabeçudo Boiadeiro) is a large and imposing breed of dog from Brazil. He is, because of his temper, considered one of the best as a guardian. His fidelity became a Brazilian proverb: "Faithful as a Row." Always seeking the company of his master. This breed was created from the cross of the Old Buldog (aggressive temperament), English Mastiff (body strength and vigor to bite) and Bloodhound (great ability to smell to track).
The Argentine bulldog is a dog breed, created by the Argentine doctor Antonio Nores Martinez, looking for a suitable animal for the big game of habitual species in Argentina, such as wild boars, peccaries and red foxes.
The Tosa Inu is a breed of dog native to Japan. Moloso of imposing aspect, is one of the favorite breeds for the lovers of the dogs of big size in the whole world. The breed arises in the mid-nineteenth century, when several large European breeds (Great Dane, Mastiff, St. Bernard, Bulldog, German Shorthaired) are crossed with the native Shikoku Inu.
The breed has its official origin in Great Britain at the end of the 19th century and the first standard (description of the set of racial characteristics) dates from 1924, date on which it was approved by the British Kennel Club. Subsequently, the American Kennel Club, the Canadian Kennel Club, the Sheiko Kennel Club, the Australian Kennel Club and the Federation Cynologique Europèene itself drafted other standards, similar in conception although some of them show certain differences.
Staffordshire Bull Terrier
The Staffordshire Bull Terrier is a breed native to the United Kingdom and with more than 200 years old was created from crosses of the old English Bulldog with Terriers of the time to give life to the fights of dogs, badgers or bears, since the Bulldogs (used to withstand the cattle while for any need in the farms or also for the shows) bit and did not release and the terriers (vermin hunters) had a more intrepid temperament.
American Staffordshire Terrier
The American Staffordshire Terrier or Amstaff is a breed of dogs native to England but widely spread in the United States and other parts of the world. Descend from the Old English Bulldog and Old English Terrier breeds. This breed arrives in the United States in the 19th century where it is perfected. In 1936 it is recognized as an independent breed with the name "Staffordshire Terrier" in honor of the province where it was supposedly originated and in 1972 the adjective "American" is added.
Mallorquin prey dog
The Dogo Mallorquin Dog (also called Ca de Bou) is a breed of native Spanish dog from Mallorca. This moloso is related to the Dogo Canario (canary prey dog). Dogo Mallorquin is crossed between the English Mastiff and bulldog.
An important attribute that Rottweiler has is its traceability. He is a very intelligent and obedient dog, capable of learning many tasks. His story as a shepherd, as a military and guard dog and also as a dog of obedience and exposure, speaks very well of his versatility.
American Pit Bull Terrier
The American Pit Bull Terrier (American Pit Bull Terrier) is a pure breed of dogs, originally from the United States, which was forged from dogs imported from the United Kingdom. They were used as fighting dogs until they were banned in 1976; They are currently raised as pets and athletes in legal sports (although the breed is still the favorite in dog fighting, now conducted clandestinely).
A few years after the conquest of the Canarian Archipelago, reference is made in the Cedular of the Canary Islands Government to its agreement of February 5, 1526.