Dogs are man's best friend, but even a cute and cuddly little puppy can grow up to be a deadly killing machine! While many people own dogs, there are a large number of people afraid of dogs. This fear goes back thousands of years and likely extends to human interactions with the wolf. We know instinctively that dogs can be dangerous, but we love the little furballs anyway.
That doesn't mean there aren't breeds of dogs that aren't dangerous to humans. There are quite a few kinds of dogs many people consider to be scary and dangerous due to their aggressive nature. We aren't suggesting all dogs of the breeds listed here are dangerous, but due to documented cases, some individuals within a breed have proven to be dangerous to humans.
These scariest types of dogs are why many people are afraid of them and in some cases, they should be. Approaching an unfamiliar dog of any breed can be dangerous, as plenty of dogs can attack humans. While most do so only when threatened, some will attack completely unprovoked and, when a powerful dog bites into your neck, it's likely you won't be getting up anytime soon.