Top 20 Most Dangerous Dog Breeds in the World: What You Need to Know

5. Bullmastiff

• Country of Origin: UK
• Weight: 100-130 pounds
• Temperament: Fearless, loyal, protective

Originally bred to guard estates from intruders, Bullmastiffs are large and powerful dogs. While they are generally good-natured, their size and strength make them dangerous if they become aggressive or feel threatened. Effective training and early socialization are crucial for this breed’s development.