Bullmastiffs are domestic guard dogs from the 19th century. Gamekeepers used these dogs to protect estates. They are a mix of the English Mastiff and Old English Bulldog, later recognized as purebred ...

Big or small, training is an important part of owning a dog. However, some breeds, especially the larger ones, may have a bit of a stubborn streak — such as the bullmastiff. Bullmastiffs are big dogs, ...