American Pit Bull Terrier: The American Pit Bull Terrier is a dog breed. It is a medium-sized, solidly-built, short-haired dog whose early ancestors came from the British Isles.
American Staffordshire Terrier: The American Staffordshire Terrier, also known as Amstaff or simply Stafford, is a medium-sized, short-coated American dog breed.
Boxer: The Boxer is a medium-sized, short-haired breed of dog, developed in Germany. The coat is smooth and tight-fitting; colours are fawn, mahogany.
Bullmastiff: The Bullmastiff is a large-size breed of domestic dog, with a solid build and a short muzzle. The Bullmastiff shares the characteristics of molosser dogs.
Dogo Argentino: The Dogo Argentino, also known as the Argentine Mastiff, is a large, white, muscular dog that was developed in Argentina primarily for the purpose of big-game hunting.
English Mastiff: The English Mastiff is a breed of extremely large dog perhaps descended from the ancient Alaunt and Pugnaces Britanniae.
Fila Brasileiro: The Fila Brasileiro also known as the Brazilian Mastiff is a large working breed of dog developed in Brazil.
Great Dane: The Great Dane is a large German breed of domestic dog known for its giant size.
Sharpei: The Shar Pei, or Chinese Shar-Pei, is a breed of dog known for its distinctive features of deep wrinkles and a blue-black tongue.
Tibetan Mastiff: The Tibetan Mastiff is a type of large Tibetan dog breed. Originating with the nomadic cultures of China, India, Mongolia, Nepal and Tibet.