5 Aggressive Dangerous Dog Breeds You Should Be Careful Of

5. Bullmastiff 

The Bullmastiff is a highly intelligent, athletic, and energetic dog. This dog breed is naturally aggressive, so it was involved in 14 fatalities in the years 2005-2017 in the United States.

Bullmastiffs are generally excellent guard dogs because of their temperamental personality, but they first have to be trained very to become obedient, well because they’re quite the aggressive dog breed!