This dog’s sheer size is often deemed a hazard especially around children. Yet these dogs were also initially bred to work as guard dogs on large estates in England.

These dogs can be trained and many people find that they make excellent pets, yet it only takes one poorly trained or poorly socialized dog to make an unfortunate headline.

These dogs have been involved in attacks on owners as well as their families. A bullmastiff with an aggressive personality can very well be a significant risk in the home or on one’s property.

The Bullmastiff’s solid build is particularly formidable. It is a powerfully built animal to say the least. Because the Bullmastiff is a born guard dog, it can aggressively if it believes its human family is in danger.

Click below for fifth dangerous dog breed……