Are Mastiffs Friendly or Aggressive to Humans?
For most people, when it comes to finding the best dog breed, they tend to opt for the friendliest dog breeds. However, if you’re looking for a watchdog it might be ideal to not try to find one of the more friendly canine breeds.
From the opinion of professional Mastiff dog experts, Mastiff dogs score out of 5 in a scale of dog breeds that are friendly with humans.