The Fila Brasileiro (Portuguese pronunciation: [ˈfilɐ ˌbrɐziˈlejɾu]), or Brazilian Mastiff, is a large working breed of dog developed in Brazil. It is known for its superb tracking ability, aggressiveness and an unforgiving, impetuous temperament. Rather than attacking its prey, the Fila traps it and waits for the hunter to arrive. Owing to these qualities, the Fila Brasileiro is used as a guard dog, and as a dog fighting dog, as a cattle dog for livestock and as a hunting dog for tracking and controlling large game. When slavery was legal in Brazil in the 18th century, the Fila Brasileiro was used to return fugitive slaves to their masters.

Height Dogs: 65–75 cm (26–30 in)
Bitches: 60–70 cm (24–28 in)
Weight Dogs: more than 50 kg (110 lb)
Bitches: more 40 kg (88 lb)
Coat: Short
Colour: Brindle, fawn, black
Life span: 9 - 11 years