Bullmastiff Vs. Mastiff - The Difference

The Mastiff is an ancient breed that can be traced back more than 2,000 years. The Bullmastiff is a more recent breed developed from crossing the Mastiff with
the bulldog.

The most noticeable differences between the two breeds are temperament, head shape, and overall size. Bullmastiffs have more energy and are more stubborn than Mastiffs. Their foreheads are flatter and their muzzles shorter. They are also shorter, more compact, and more muscular. They weigh far less than Mastiffs: males are 110 to 130 pounds and females are 100 to 120 pounds.

Males should be 25 to 27 inches tall (63.5 to 68.5 cm) at the withers. Females should be 24 to 26 inches (61 to 66 cm) at the withers. Exceeding these dimensions is discouraged by breeders as they are too big to do their jobs.

Any shade of brindle, fawn, or red is acceptable in the AKC (American Kennel Club). The fawn is a light tan. Red can range from a light red-fawn to a dark rich red. Brindles are a striped overlay of the fawn or red. A Bullmastiff should have no white markings, except for on its chest where a little white is allowed. See breed standard under external links for additional details