15 Dog Breeds That Cannot Be Kept as Pets

7. Boerboel

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  The Boerboel is a massive South African mastiff bred to protect farms and properties. They are known for their intelligence, strength, and independence, and require thorough training and guidance.

  Boerboels are banned in Denmark and Romania, where concerns about their protective nature and aggressiveness have led to restrictions. Without strict training, Boerboels can become territorial and excessively aggressive toward strangers.   Why they are banned: Extreme protective instinct and strong protective behavior. Where they are banned: Denmark, Romania, and parts of Europe.