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, ...

What makes Bullmastiffs so unique? 7 facts that might surprise youTheir big head, dark eyes, and deep muzzle show they’re smart, alert, and ready to protect.

Things you didn’t know about Bullmastiffs.