Three most dangerous dogs in the world 1. Pitbull: The term ‘pit bull’ encompasses certain breeds of dog from the American Pit Bull Terrier, the Staffordshire bull terrier, the American Staffordshire terrier, and the American Bulldog. Originally bred for baiting bulls and bears the majority of their breeds were also used for dog fighting in numerous parts of the world and is considered as the most dangerous dog in America. The blood sport of “bull baiting” began over 1,000 years ago in England. What is undisputed is that by 1500, bull baiting had progressed to Britain’s national pastime. Bulldogs were reportedly first mentioned by name in 1631, referring to their function rather than a distinct dog breed. By 1800, and through further selective breeding, the bulldog developed into a compact muscular dog characterized by tremendous jaw strength. The pit bull’s “hold and shake” bite style causes severe bone and muscle damage, often inflicting permanent and disfiguring injuries. Moreover, once a pit bull starts an attack, firearm intervention may be the only way to stop it. From 2000 to 2009, there were three fatal attacks involving shelter dogs (one pit bull, one breed similar to a pit bull, and one Doberman). But from 2010 to 2014, there have been 35 shelter dogs who fatally attacked humans. All but 11 were pit bulls. 2. Tosa Inu: The Tosa Inu is a massive dog with some variations weighing anywhere between 130 to 200 lbs and can reach heights of 24.5 to 32 inches. Originally bred to be a fighting dog, it is considered dangerous and legally restricted in some countries. Tosa Inu is known as a fighting dog from Japan. But, what people usually don’t know is that this giant breed spent its first days fighting along with their best friends. At one point in history, this breed almost completely disappeared from the face of the Earth. Tosa Inu is the best of what Japan has to offer when it comes to astonishing dog breeds. Tosa Inu is one of the largest of the breeds. They are also well known as Tosa Dog, The Tosa, Tosa-Ken, Japanese Mastiff or Japanese Fighting Dog. Also ‘Inu’ is the Japanese word for dog. This giant breed was originally developed as a massive dog-fighting machine. If you want a calm and peaceful dog, Tosa Inu just might be your perfect match. Fights among Tosa dogs in Japan have one basic characteristic: they are a silent “war”. The nature of the Tosa Inu is peaceful, even though it is considered dangerous; it is very much attached to its owner, it is a very alert guard dog, and it is very loving with children. 3. Dogo Argentino: The Dogo Argentino is a large, white, muscular dog that was developed in Argentina primarily for the purpose of big-game hunting, including wild boar and puma. Though extremely strong and athletic, the Dogo was bred to be non-aggressive towards humans. Nevertheless, it is illegal to own a Dogo in the United Kingdom under their Dangerous Dogs Act of 1991. Powerful, yet possessed of an almost feline grace, the Dogo Argentino is fearless yet sensitive; vivacious outdoors yet calm indoors. Strong-willed and independent, but also highly intelligent, the Argentine Dogo will respect an owner who is equally confident and consistent. Because of his hound heritage, the Dogo is constantly intrigued by the exciting smells around him, so you must work to keep his attention during training sessions.