Pet Advisor Blog

English Mastiff – Dog Breeds Guide

Breed summary

Size: Giant
Weight: 150 pounds to 160 pounds
Height: 27 inches to 30 inches
Longevity: 12
Bark Tendency: Low
Aggression: Medium
Compatibility to other pets: Medium

Adopt an English Mastiff, Dog Breed Guide


The English Mastiff or more commonly known as the Mastiff is considered to be one of the heaviest of all the large dog breeds. They can weigh over 200 pounds! These are guard dogs that require no training as their naturally instincts to guard will always take over.

Official Name

English Mastiff
Other Name – Old English Mastiff


Date – depicted in Egyptian monuments as early as 3000 BC
Country – Great Britain
Family / Group – Mastiff, Working

Recognized By

American Canine Registry
American Pet Registry, Inc.
Australian National Kennel Club
American Kennel Club
Canadian Kennel Club
Continental Kennel Club
Dog Registry of America, Inc.
Fédération Cynologique Internationale
Kennel Club of Great Britain
United Kennel Club
National Kennel Club
New Zealand Kennel Club
North American Purebred Registry, Inc.


English Mastiffs are one of the dog breeds that have been bred since the ancient times. The precise history of this particular dog breed is a bit hazy. Historical record does show that it has been bred in Great Britain for more than 2,000 years. They origins can be traced to the lines of the ancient Tibetan mastiff dogs that predate the Roman Empire. These large dogs were originally bred as guardian dogs. They are also dogs that were used as fighting dogs, in war as well in dog fighting. Today, most of these dogs are now kept as companion pets.


The Mastiff is one of the most adaptable large dogs known in the dog universe. These bulky canine companions will do great in all sorts of living conditions. It will also adapt to any amount of living space. They are naturally protective of their family and will become suspicious when new faces arrive in their territory. These mastiff dogs are very dignified and oozing with self-confidence.

Bred For

English Mastiffs were and continuously bred today as watchdogs and guardian for livestock. They are also used today as police dogs and some services the military. These mastiffs are also trained in search and rescue and weight pulling competitions.


The English Mastiff dog breed is impressively adaptable when it comes to living conditions. They will be equally good pets in large and small spaces.


The English Mastiff dogs have a smooth and short-haired coat covering their bodies. This type of coat is very easy to groom and maintain. They are dogs that shed hair in average amounts.


They may be very obedient, but these English mastiff dogs are also known to be tough to train. The key to have these large dogs well trained is a gentle but firm training approach. Owners should be patient with these dogs as they can get a bit sensitive to harshness.


These large mastiffs are extremely prone to hip dysplasia because of their massive size. Diet supervisions is recommended for this English dog breed as they have a very high tendency to get overweight. Other major medical issues to be concerned with the English Mastiffs are gastic torsion and CHD. Minor health issues that may arise will include ectropion, elbow dysplasia, vaginal hyperplasia, PRA and PPM. There are some lines of these dog breed that are occasionally plagued with cardiomyopathy.


English Mastiffs are known to be lethargic or just downright lazy! They have a high risk of being obese so regular exercise are required even if they don’t like it. Take them on long walks every day to help maintain a fit body and a mentally sound temperament.