Dogtionary Lite: Most Dangerous, Dogs have fulfilled many roles for their owners; loyal friend, companion, workmate, family pet. Discover a small sample of the 260 different breeds as found in the premium Dogtionary. We all know dogs repay love and kindness. But some are still bred for their fearsome nature or fighting prowess. Dogtionary: Most Dangerous references these dogs. Dogs originally bred to fight for livestock, property or the person.