15 Dog Breeds That Cannot Be Kept as Pets

6. Perro de Presa Canario

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  The Presa Canario is a massive, muscular dog that was originally bred to guard livestock in the Canary Islands. It is known for being very dominant and fearless, which makes it dangerous in the wrong hands.

  Due to several high-profile attacks, Presa Canarios have been banned in Australia and New Zealand, and ownership of these dogs is restricted in several European countries. Their protective instinct and territorial behavior require strong, experienced owners who can set firm boundaries for them.   Why they are ostracized: Protective instinct, dominance, and past attacks. Where they are banned: Australia, New Zealand, and parts of Europe.