Dog Breed Profile

Home Dog Breeds Working Mastiff

Mastiff History

The Mastiff is a medium to large-sized Molosser-type guard dog. The name “mastiff” also refers to a group of similar-looking, closely related dogs. The mastiff classification was created because many of the originally described dogs were of a similar type, used for similar purposes.

Time of Origin


Country of Origin




Mastiff Physical Characteristics

The Mastiff is a large, strong, large, and massive, often, giant, muscular, and heavily built, with a massive head, short legs, and a rectangular or square-shaped body. It has a large, wide, and short muzzle, a well-developed jaw, and a heavy, heavy dewlap. It has a long, thick, and coarse, straight, and corded coat. Its tail is low-set, thicker at the root, and tapers to a point. It has round, dark eyes. The adult height ranges from 30 to 32 inches at the withers, and the weight is about 120 to 160 kg (260 to 350 lb).

Eye Colors


Nose Colors


Coat Colors


Height Range

Male Height Range: 30 – 36 inches

Female Height Range: 28 – 36 inches

Weight Range

Male Weight Range: 170 – 230 lbs

Female Weight Range: 120 – 170 lbs

Mastiff Health

Description of breed health.


8-9 yrs

Mastiff Health Concerns

Gastric Torsion, Hip Dysplasia, Entropion, Ectropion, Elbow Dysplasia, Progressive Retinal Atrophy, Retinal Dysplasia, Hypothyroidism

Mastiff Temperament and Behaviour

The Mastiff is a large, powerful, and courageous breed of dog. They are suitable for guarding property and are protective of their family. They are calm, gentle, and affectionate, but will not be afraid to fiercely protect their family. They are typically loyal to one person only and can be very territorial.

Mastiff Activity Requirements

The Mastiff is a large, strong, and protective dog. They are one of the largest and tallest breeds in the world. The Mastiff is a gentle, loving, and very loyal dog. While they are not very active, they do enjoy socializing with their family. They especially love to play and cuddle with their people. This sweet natured, calm, and easygoing dog makes a wonderful companion. While they do not require a lot of exercise, the Mastiff does need a moderate amount of daily activity. While they do not need a long, intense workout, they do need to play and run around the yard. The Mastiff is best suited to large yards or a home with a backyard. They will not be happy living in an apartment. While they are calm and laid-back, they do require regular exercise.

Miles Per Day

15 miles

Activity Per Day

60 minutes

Daily Food

8.5 cups

Kennel Club Recognition

American Kennel Club

Recognized by the American Kennel Club

Mastiff is part of the Working group.

Visit the American Kennel Club website.

The Kennel Club

Recognized by The Kennel Club

Mastiff is part of the Working group.

Visit the Kennel Club website.

Australian National Kennel Council

Recognized by the Australian National Kennel Council

Mastiff is part of the Utility group.

Visit the Australian National Kennel Council website.

Canadian Kennel Club

Recognized by the Canadian Kennel Club

Mastiff is part of the Working Dog group.

Visit the Canadian Kennel Club website.