5. Pit Bull
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According to Marcy Setter, a representative of the Pit Bull Rescue Center, there’s no one dog breed that’s inherently more dangerous than the pit bull. Granted, you can train a pit bull to become a loyal pet, but adopting a mature pit bull is practically a recipe for disaster. They are a highly intelligent breed that values independence over anything else, but with extreme patience and even more extreme discipline methods, you’ll have gained a loyal friend for life.