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, ...

When you meet a bullmastiff, your first inclination might be to quietly step back and move away, but don’t be fooled by the impressive working breed’s size and formidable appearance. Experienced ...