The Mastiff dog breed is one of the oldest varieties of dog breeds. The Molossus, their progenitor, was recorded 5,000 years ago. They were ferocious war dogs back then, completely different from the friendly behemoth that the breed is now.
Although their size gives them the appearance of being aggressive, Mastiffs have good-natured docility. However, if danger threatens their family, this dog will step in to protect them.
This huge breed is typically friendly, although it is best suited for households with no little children. They can do considerable injury with their jaws if they bite with a massive force.