The Mastiff is confident, dignified, and very gentle-natured. Mastiffs rarely bark, but they are not fond of strangers and will defend their territory and family when necessary, making excellent guard dogs. The Mastiff tends to drool.
The Mastiff has a shoulder height of 27-30 in and weighs 150-200 lbs. It is the largest breed by weight. In 1989, a English Mastiff named ‘Zorba’ set the Guinness World Record for heaviest dog at 143 kg (315 lbs), measuring over 8 feet from the tip of the nose to the tip of the tail. Mastiffs have a very large head with a short, wide muzzle, and ‘V’-shaped ears. They have a flat back, high-set, low hanging tail, and large, round feet.
The Mastiff has a short-haired, fawn (light-yellow brown) coat, which ranges in color from silver to apricot to dark brindle. All Mastiffs have a black mask, ears, and nose.
The Mastiff is good with children, and gets along well with other dogs and household pets if properly socialized. In the words of the 1800 Cynographia Britannica ‘What the lion is to the cat, the Mastiff is to the dog. The noblest of the family, he stands alone, all others sinking before him...I have seen him down with his paw the Terrier or cur that has bit him, without offering further injury. In a family he will permit the children to play with him and will suffer all their little pranks without offence.’
The Mastiff coat requires little attention; dead and loose hairs should be removed with a rubber brush when the Mastiff is shedding. As with all very large dogs, the Mastiff needs a soft place to lie down to avoid pressure marks. The Mastiff has a lifespan of 9-11 years. Common health problems for Mastiffs include hip and elbow dysplasia (malformed joints which can cause lameness or arthritis) and bloat, which can be prevented by placing the dog’s food dish on a raised surface, spacing meals throughout the day, and avoiding exercise immediately after meals. Obesity is also a potential issue for Mastiffs; proper exercise and nutrition are critical. Mastiffs prefer life indoors and are not well suited to hot weather.
Mastiff training must be conducted in an atmosphere of mutual respect, with consistency and understanding. Obedience training at a young age is recommended. Mastiffs are happy to learn, but may refuse to perform tricks they consider pointless.
In spite of its large size, the adult Mastiff has only an average need for exercise. It enjoys walks or play in a large fenced-in yard. Puppy Mastiffs should not be over exercised—the Mastiff requires all of its energy to grow strong bones and put on weight. Due to their large size and space requirements, Mastiffs are not recommended for small apartments.