1, pit bull (bull terrier, USA). Originated in the United States in the19th century, it is generally 46-56 ㎝ tall and weighs between15-35 kg. Its head is slate-shaped, with strong jaws, strong muscles, strong bite, lasting endurance and amazing perseverance. Based on the comprehensive factors such as height, weight, bite force, endurance, perseverance, firmness, loyalty and intimacy with human beings, pit bulls are superior to fierce beasts such as lions, tigers and leopards. 30 kilograms of strong bits may have hit 75 kilograms of Caucasus, and can kill 2 sheepdogs in 3 minutes. "Federation Cynologique International" (F.C.I for short) ranks NO 1 of fierce dogs! 2. Tosa fighting dog. 1860 or so, this frightening dog breed was bred in Japan for the first time. We can only describe the character of Tosa fighting dog with cruelty and ruthlessness. What is even more frightening is that, except when the fellow bites his opponent, the usual Tosa fighting dog looks so quiet and tame. If you try to get close to it or even touch it, it may bite your throat in return. With the exception of the United States, most countries have banned the breeding of this vicious beast as evil as the devil. Du Gao, Argentina. Du Plateau, produced in Argentina, is a fierce dog breed used to hunt large wild animals, mainly wild boar and mountain lion. It will bite wild animals in rugged and dangerous terrain until hunters come to kill their prey. It is an excellent breed that combines 10 excellent dog breeds. Its blood contains the strength, tenacity and strength of a large fierce dog. It has elegant appearance, strong muscle shape, smooth curve and good balance ability, and can break through obstacles and take prey directly. Famous referees of foreign clubs have been told to keep these firmly in mind when evaluating this breed. It is a noble companion and a loyal and inviolable guardian. His strength, tenacity, keen sense of smell and courage make him the best dog breed to hunt wild boar, puma and other carnivores in Argentina's vast and complex terrain. 4. Caucasian dogs. Caucasian mountain dog or Caucasian dog, English name is Caucasian Ovcharka. It is about 65-86 cm tall and weighs about 70-8 1 kg. It originated in Chechnya and the Caucasus Mountains in Russia. It is said that its ancestor was Tibetan mastiff. In the former Soviet Union, the Caucasian Mountain Dog was once regarded as the national treasure of the Soviet Union and its export was restricted. Therefore, the Caucasian Mountain Dog received little attention from the outside world in the past. Caucasus Mountain dog is a super-large dog with strong appearance, strong muscle tissue and strong body structure. The skin is thick and elastic. The skull is wide and the bones are well developed. The forehead is broad and flat. The mask is shorter than the forehead and gradually tapers. Most of them have dark black eyes and are of moderate size. The nose is large and long, mostly black. Ears are covered with medium fur, and they are usually trimmed and short and drooping. The figure is strong, the chest is thick, the skeleton is big, the muscles are developed, the body is high and the back is horizontal. Strong limbs, large and slightly arched feet, oval. Toes are tight. . The tail is thick and slightly high, reaching the ankle joint when hanging down, and can be held high in the upward bending area or bent on one side. The coat is natural and rough, while the well-grown undercoat is thin. The fur on the head and front ends of limbs is short and close to the body, and there are long hairs and short hairs. The coat color is generally light gray to reddish brown, and there are also many mixed colors such as light yellow, yellow, white, stripes, spots and two colors. The Caucasian Mountain Dog is strong in body, strong in disease resistance, brave in temperament, calm and stable, highly alert, sensitive in intuition, strong in personality, confident and loyal to its owner. It is most suitable for guarding homes, guarding villas, warehouses, farms or pastures, but it is not suitable for general family feeding. 5. Tibetan Mastiff China's strongest fierce dog, I don't need to introduce it. 6. Brazilian Mastiff Mastiff's unique strong and fierce sense of smell like a hound has created a terrible Brazilian Mastiff. It is precisely because of these characteristics that it has brought a very disgraceful history-manor owners used it to hunt down runaway slaves. Although the Brazilian mastiff has long abandoned evil and started to manage cattle, it is still a frightening dog breed in terms of its huge size and aggressive personality. 7. Italian guard dog (Castro) Origin: Spain use: guard, brief introduction to the history of cattle herding: it is native to the Canary Islands, and is obtained by crossing "majorero" with the foreign fierce dog, the predecessor of cattle dog, Spain, which is produced in the islands. It is a DOGO-like dog of medium size, with yellow tiger spots and energetic white spots. A fierce dog with the characteristics of a fierce dog. Flexible, big-tempered, simple and loyal. General appearance: medium-sized fierce dog, with strong balance, strong appearance and black patches. Simple, well-proportioned, and fit for exercise. Body length is greater than height, especially for females. Temper/behavior: They are calm in appearance and concentrate on gazing at objects. In particular, it has the functions of guarding, regulating and driving cattle. They have a balanced temper and strong self-confidence. The bark was serious and deep. It is gentle and gentle in the family, greatly influenced by its owner, wary of strangers, confident and noble in appearance, and a little indifferent. When it is alert, its attitude looks tough and its eyes are alert. Color: All range of markings are allowed: from dark and very warm tones to light gray or golden yellow. Light yellow to sandy yellow is also included. Plaques are allowed on the chest, at the root of the neck or throat, and on the front and rear feet. It is best to shrink the area of the plaque to a minimum. 8. Rottweiler. It is the monster with phosphorescence in adventures of sherlock holmes, and it is the nightmare of any intruder who dares to step into its territory. Its calm and confident expression is easily reminiscent of Hannibal in the movie The Silence of the Lambs. It is precisely because of its primitive territorial consciousness and strong possessive instinct that many people still regard it as the most powerful protector of family property security. 9. Newpoliton (Doberman) You can tell from his body that this is by no means a good Lord. Do you know what people used to do? To tell you the truth, it is a variety cultivated by a German tax official named Ludwig Doberman, who specializes in assisting the owner to collect taxes (this person must be rated as advanced)! Moreover, the early Doberman was born to be aggressive and aggressive. The next time you hold a payroll, don't complain. Think about the Germans at that time, and maybe it will be more balanced. 10, Spanish bullfighting terrier (Piro de Berisha Maroquin) It seems that there are many fierce dogs in Spain, so it is no wonder that the boys there would rather go to bullfighting than provoke them. When you see it, the most important thing is to run and hide, not to call out its name. It is said that this kind of dog was first used for fighting, and later when the world was peaceful, people used it to fight bullfights; Later, perhaps the matadors felt that they had robbed them of their jobs and simply let them fight each other; Later, dog fighting activities were also banned, and the number of such dogs became less and less. Yes, who dares to keep these ferocious guys at home?