#5. Bull Mastiff
The Presa Canario is one of the popular Mastiff breeds in Spain what is originally bred for working livestock. The weight of these dogs are normally ranging from 110-140 pounds with 8-12 years life span and 1.9-2.2 feet height. It’s bite force is surprisingly 552 pounds of pressure. It’s a wild type dogs but proper training when they were young can be dominant this wild character. These breed become very dangerous when they cross with even more dangerous dogs. Even they can be fatal on that time. (M.C)