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3. Japanese mastiffs
Japanese mastiffs originate from the east as fighting dogs. And unlike other canines, who normally warn with barks and growls to back off, these dogs have been bred to attack silently. As a result, owning Japanese mastiffs is often banned or controlled in many countries as they pose a high danger to the public. Indeed, they have very specific training needs from firm, but fair, owners to avoid triggering any aggressive behavior.
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