At first glance, the same mountain mastiff, the Belgian mastiff, “Asian” or Russian mastiff may seem rather calm and even phlegmatic. In fact, behind the external indifference lies a strong character. Mastiff is the ancestor of all varieties of working dogs. But before you buy yourself a puppy of this breed, it is worthwhile to find out in more detail what types of mastiffs are.
#1 English Mastiff.
#2
#3 Brazilian Mastiff /Fila Brasileiro.
#4

Fila Brasileiro does not trust strangers, so hospitable people are better not to get such dogs.