China Tibetan Mastiff, the overlord of fierce dogs, is a world-famous large-scale fierce dog, which originated from the Qinghai-Tibet Plateau in China. It is the only dog in the world that dares to fight wild animals, so it has been endowed with the reputation of "Oriental God Dog" and known as the living Buddha Mountain in Tibet. Although fierce, Tibetan mastiffs are particularly loyal to their owners, guarding the group, the house and the hospital for Tibetans. 2. Russian Caucasus origin: Russia, Caucasus Republic origin: medieval original use: livestock care dog current use: livestock care dog, safe life: 9- 1 1 year, weight range: 45-70 kg, height range: 64-72 cm 3. Italy Twipoliton Origin: Italy Origin: Ancient original use: livestock care dog, current use: fighting dog: companion dog, security dog, life span: 9- 1 1 year, alias: Napoli mastiff, Napoleon mastiff, weight range: 50-68kg, height range: 65-75 4. Brazil Lefei origin: Brazil origin:19th century, original use: tracking, large-scale hunting, current use: safety, companion dog life: 9- 1 1 year. Alias: Brazil Ferrer weight range: 4 1-50 kg height range: 6 1-76 cm. Fierce and excellent tracking dogs were originally dogs that tracked runaway slaves. Once targeted, its escape probability is almost zero. 5. French Bordeaux (Dogue de Bordeaux) Country of origin: French period of origin: ancient original use: guard dog, hunting dog Now use: companion dog, guard dog life: 9- 1 1 year weight range: 36-45 kg body height range: 58-69 cm fierce and powerful, also known as red mastiff. 6. Country of origin of Argentina Dugo: Argentina origin period:1920s Original use: hunting competition and dog fighting Current use: companion dog life:10-1year alias: a.