It’s well established that dogs are truly man’s best friend—always loyal and affectionate, staying by their owner’s side and often defending them in risky situations. The problem is that some breeds, due to their large and powerful build, can turn against their owner or even attack when under stress. Some argue that with proper training, even these breeds can be gentle, but many people remain skeptical.
1. Pit Bull

This breed is the most widely reported in attacks around the world. Every so often, amid the tragedies in the news, we see a report about an attack by an animal of this breed—whether it escapes and attacks people on the street or even turns on its own owner. Some veterinarians say that with proper training, the breed is very calm.