Giant Maso Mastiff

Breed Rating

family friendly:
Dog friendly:
Watch/guard dog:
Affection / Dependance:
Exercise needed:
Space needed:
Tendency to bark:
Grooming Requirements:
Tendency to bark:
Grooming Requirements:

Breed Attributes


Breed group: Non-Sporting    Type: Pure Breed    Talent: ,


Size: Large     Weight: 130-200 lbs     Fur length: Short    Ears: Flappy    Fur type: Straight    Fur Color: Black, Gray / Salt & Pepper, Light Brown / Golden, Merle / Spotted / Brindle / Speckled, White / Cream


Life Expectancy: 10-12 years    Rarity: Uncommon    Availability: Hard to find    Climate: Good for every climate.

Breed Details


The Giant Maso Mastiff is a new and still a developing breed that is being developed with the aim to produce a healthier version of Old English Mastiff dog that can live longer. Originating in Germany, these dogs have more English Mastiff in them than the other parent breed, the Cane Corso Itliano. The breeding program started in 2001 with crossing between Old English Mastiffs and Cane Corso Italiano.

These dogs have the great size, lovable, gentle, disposition of the Old English Mastiff, with better maternal instincts, higher intelligence, along with more muscle and the protective instincts of the Cane Corso.

The breed comes with a large and square head with a rectangular muzzle. Small brown eyes are set close to each other. The neck is thick and has folds of skin. Chest is deep. The body is strong and muscular that comes with long and powerful legs. Shiny coat is short and sleek and comes in black, gray, fawn, apricot and many brindle variations.

This breed is still in developing phase and is NOT recognized by AKC or other major kennel clubs.


The dog comes in different solid colours as well as in brindle colouring. Colours include fawn, gray, gray brindle, reverse brindle, apricot and solid black.


The breed sports a short and sleek coat that is shinier than Old English Mastiff coat.


A true 'Gentle Giant', the Giant Maso Mastiff not only has more than 75% of Old English Mastiff in its bloodline, it actually displays the calm and gentle character that the Old English Mastiff is known for. This dog is very loving, affectionate, loyal and alert that is intelligent and dignified. It is calm, steady and docile breed that is very patient and kind to children, thus very suitable for families with children. Eager to please and craving for love, the dog is very trainable through gentle yet firm training. This dog gets along well with other dogs. Naturally protective, the dog will protect its family if such situation arises. It is not a barking dog but will watch out for intruders, making itself suitable as watch dog. The dog is suitable for not-so-active families and owners as it is not a very active dog and likes to be rather inactive indoor or outdoor. For this reason, it is fit to live in almost any living condition; an apartment, a house with a yard or any dwelling will suit its nature. It is a clean breed with very little to no drooling. The Giant Maso Mastiff is an excellent companion dog that live to please its owners as well as act as an intimidating and protective guard dog.


Short coat of this breed will not require much of grooming. Weekly brushing will keep the coat clean and healthy. A rubdown of the body with a chamois or towel will keep the coat shining. Bathe is needed only when the dog gets really dirty.


It is a very good natured, obedient and eager to please breed that is very trainable through gentle yet firm training. The objective of the training should be to achieve packleader status. The owner and all other humans should be seen as dog's packleader.


The Giant Maso Mastiff is relatively laid-back and inactive breed that will be happy with whatever amount of exercise it gets. It is not a dog with high physical activities and does well with short walks every other day. This does not mean the dog is lazy, it can accompany its owner and family on long walks. This dog is suitable for almost any kind of dwelling. It is rather inactive when indoor and will o.k in an apartment as well as in a house with a large yard.

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