4. Fila Brasileiro (Brazilian Mastiff)
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The Fila Brasileiro, or Brazilian Mastiff, is known for its intense loyalty, territorial instincts, and strong guarding abilities. This breed was historically used for tracking and capturing runaway slaves in Brazil, making them naturally protective and aggressive toward strangers.
Fila Brasileiros are banned in New Zealand and the UK, and ownership is heavily regulated in other countries. While they can be extremely loyal to their owners, their protective nature makes them unsuitable for homes with frequent visitors or young children.
Why They’re Banned: Extreme guarding instincts, unpredictable temperament, and size. Where They’re Banned: UK, New Zealand, and parts of Europe.