Before falling for those puppy eyes, here’s a quick guide on the dangerous dog breeds you should know and what makes them more aggressive. Dogs are often considered man’s best friend, but not all breeds are created equal when it comes to safety. Some breeds have gained a reputation for being more dangerous than others, due to their size, strength, and temperament. In this article, we will explore the top 10 most dangerous dog breeds in the world, as well as discuss some interesting trends related to the topic. 1. Pit Bull Pit Bulls are perhaps the most notorious of all dangerous dog breeds. Known for their powerful jaws and ... Not all dogs are man's best friend. Discover the most dangerous dog breeds that you should think twice about owning this year. And while you can never make assumptions about any animal, a new study has revealed what could be the most dangerous dog breeds based on their behavior—including one unexpected entry.