13. Brazilian Mastiff
Advertisement
The Fila Brasileiro, or Brazilian Mastiff, is a giant working breed from Brazil. Famous for tracking, fierceness, and boldness, the Fila can be a good pet for experienced handlers. Muscular and extremely stubborn, they are often aggressive and hostile toward outsiders or perceived threats. Weighing up to 99 pounds, they may be gentle giants or fierce protectors, depending on upbringing.
Advertisement
