The words Dog Breed Info with the letter D inside of a black paw print

Ambullneo Mastiff

Information and Pictures

Ambullneo Mastiff standing outside

Anastasia the adult female Ambullneo Mastiff

  • Am-Bullneo Mastiff
Other Names



The head is large with a broad skull, a short muzzle and a tenacious set of jaws. The forehead is slightly arched and the stop is moderate. The nose is wide and has large nostrils. The teeth meet in a level or undershot bite. The ears are usually cropped medium length, lobe and bell; if un-cropped a natural drop ear is allowed. The neck is thick and the shoulders are wide. The chest is deep, broad and heavily muscled. The top line is straight and the tail is wide at the base tapering down and ending at the hocks. The Ambullneo's lateral movement is unsurpassed by dogs of this size. The Ambullneo's thick bone and rippling muscles give the appearance of great strength.


The Ambullneo Mastiff is a natural guardian companion to his pack (family). This highly intelligent K9 loves to please his master at any number of tasks. These dogs are very sensitive to the tone of your voice and need someone to speak with assertiveness, but not harshly. It is not a difficult dog but does require a handler who can assert his authority. The Ambullneo would give his life for his family. Early socialization is a must. They should be obedience trained at an early age. It is important to establish pack leadership and be able to read your dog’s actions and body language. This robust K9 loves to learn new things and is forever searching for approval to strengthen the bond with his master.

Height, Weight

Height: Males 24 - 29 inches (61 - 73 cm) Females 21 - 25 inches (53 - 63 cm)

Weight: Males 130 - 150 pounds (59 - 68 kg) Females 110 - 130 pounds (50 - 69 kg)

Health Problems

As with all Mastiff breeds, hip dysplasia may occur, so until the dog is mature over-strenuous activity should be discouraged.

Living Conditions

Ambullneos do well in the snow as long as there is a warm dog house. They do well in 90 degree temperatures as long as there is plenty of shade, a dog house and plenty of fresh water. They are happiest with lots of yard to patrol and enjoy. No less than a 5-foot fence should surround the property. Ambullneo Mastiffs do not do well in an apartment.


This breed needs a good deal of exercise and plenty of fresh water and shade. They should be taken on daily regular walks to help release their mental and physical energy. It's in a dog’s nature to walk. While out on the walk the dog must be made to heel beside or behind the person holding the lead, as in a dog's mind the leader leads the way, and that leader needs to be the human.

Life Expectancy

About 10 to 12 years.

Litter Size

About 6-8 puppies


The short-haired, slightly rough coat is easy to groom. Comb and brush with a firm bristle brush, and shampoo only when necessary. There is little shedding with this breed. Check the feet regularly because they carry a lot of weight. Also trim the nails when needed. The short, dense coat is easy to groom with a good brushing once a week.


A relatively new breed, the Ambullneo Mastiff made its debut in the early 1980s in Southern California. Mark Reasinger, Ph.D. began this 57.5%, 42.5% Mastiff Bulldog breeding program and another decade passed before the F1 progeny was ready to be stored in the cryogenics bank. After testing for intelligence, hips, elbows and other physical abnormalities only the finest puppies and dogs were used. The breed is now in its 13th generation.


Mastiff, working

  • NKC = National Kennel Club
  • DRA = Dog Registry of America, Inc.
Close up - The face of an Ambullneo Mastiff.

Adult Ambullneo Mastiff

A black Ambullneo Mastiff standing outside on a dirt hill. There is a person standing to the right of it with the dogs leash.

Rocky the adult black Ambullneo Mastiff

The front left side of a black with white Ambullneo Mastiff that is playing around outside and it is looking forward.

Raider the adult black with white Ambullneo Mastiff

Close up - The front left side of a brindle Ambullneo Mastiff puppy is looking forward, its mouth is open and its tongue is out.

10-week-old Ambullneo Mastiff puppy

The left side of a brindle Ambullneo Mastiff puppy smelling that is smeeling the ground on a stone porch.

10-week-old Ambullneo Mastiff puppy

The front right side of a brindle Ambullneo Mastiff Puppy is standing against a chainlink fence and it is looking forward.

10-week-old Ambullneo Mastiff puppy

A Litter of Ambullneo Mastiff puppies are gathered around a food dish.

A litter of Ambullneo Mastiff puppies eating

A tan with black Ambullneo Mastiff is sitting with mouth its open and its tongue out.

Nale the fawn female Ambullneo Mastiff

The right side of a black Ambullneo Mastiff that is standing across a beach and it is looking to the left.

Pebbles the Ambullneo Mastiff female at 8 months old

A black with white Ambullneo Mastiff is sitting outside at a beach and it is looking to the left.

Pebbles the Ambullneo Mastiff female at 8 months old

A black Ambullneo Mastiff is standing next to its owner across a beach and it is looking forward.

Pebbles the Ambullneo Mastiff female at 8 months old

An adult Ambullneo Mastiff is jumping up at a fence and an Ambullneo Mastiff puppy is looking away from it.

Dionne the Ambullneo Mastiff puppy with bandages on his ears looking up at full-grown Scooby Doo