A large sized Mastiff
Mastiff Quick Summary
Also Known AsOld English Mastiff
Height (at withers)27-30in (69-76cm)
Weight150-160lbs (68-72kg)
Hair Colour(s)
Lifespan10-12 years
Energy LevelLow
Litter size2-5
Barking TendencyMedium
Exercise requirementsLow
Ease of trainingLow
Suitability for kidsMedium
Animal compatabilityMedium
Aggression levelsLow
Distress if leftHigh

The Mastiff is a large and imposing looking dog, the heaviest breed there is. The body is massive, broad, deep and long with straight legs and a high set narrowing tail. The head is square with a large, blunt muzzle, small high-set ears, small dark eyes and a black face mask. The top lips hang slightly over the lower lips. The coat is short and the colouring tends to be apricot, light fawn and brindle colours.


Mastiffs tend to be known as gentle giants with calm and patient dispositions. These are attentive and loyal dogs that like to be around their owners a lot, even if it is just napping at their feet, and need plenty of affection. They don't like to be left alone for long periods of time, and being left can result in anxiety and destructive behaviour, not a good thing in such large dogs. They are affectionate and devoted, and make fine companions and family pets, although owners should be aware of how much these dogs can drool or break wind. Mastiffs are also docile dogs that like to nap, and so are not likely to want to play fetch. In addition they are pretty hard to train too, despite being intelligent and eager to please, and so plenty of patience is required here. Due to this and their large size, they are best suited for those with some experience of dog ownership and training rather than for novices. Mastiffs are very tolerant with children, but due to their size are only suitable for older, more considrate children rather than young ones. Early socialisation is vital around other dogs and pets, and some Mastiffs may not tolerate other dogs or cats. As they were bred as guard dogs, they still pose an intimidating deterant and will generally only bark for a reason.

History & Skills

Mastiffs originate from England, and are also known as Old English Mastiffs. They have an ancestry dating back to Roman times where they were used as fighting dogs on battlefields. This practice continued on into the late Middle Ages, and Shakespeare referred to them as The Dogs of War. Mastiffs were later also bred as working dogs for guarding duties on farms and country estates, and despite their early violent history they have gained popularity as housedogs, and are still used as watchdogs and guard dogs.

Breed Specific Ailments

Mastiffs tend to live between 10 to 12 years. Some of the health problems noted in this breed includes hip and elbow dysplasia, like in many large breeds, and also ectropion, hyperplasia and cardiomyopathy. They are also prone towards bloating, and must be given regular exercise to prevent obesity. Puppies must be fed carefully due to their rapid growth rates.


Mastiffs are moderate shedders that shed more heavily on a seasonalbasis, and so may not be suited to those suffering with allergies. Their grooming requirements are not high though, and their short coats only require occasional brushing and polishing with a cloth to keep it glossy. They can be bathed or dry shampood as necessary.

Exercise & Environment

Matiffs tend to live indoors and can be suitable for small homes such as apartments as long as they are exercised. This breed can be a little lazy and so a daily walk and some play are advised, plus acccess to a secure outside area. They prefer moderate to cool climates.


FCIFCI - Federation Cynologique Internationale
KCThe Kennel Club (UK)
AKCAKC - American Kennel Club

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