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Life span: 08-10 Years

Height: 64-68cm (Male); 61-66cm (Female)

Weight: 50-59kg (Male); 45-54kg (Female)

Bull Mastiff is a larger dog breed and can be protective dogs which can protect your livestock. They have the characteristics and behavior similar to Molasser dogs. Bull Mastiff is calm, lively, friendly, energetic, active and alert pets which are protective dogs. Bull- Mastiff originated from the United Kingdom and are not hypoallergenic.

Physical Characteristics

Its large body is strong and well proportioned, with a medium length tail that thins out and is normally carried high, and small ears that sit high atop its head. Its eyes can be hazel or brown with a black nose. Its coat is short and straight, but dense and can be red, light brown, brown, or black. Sometimes they might have a small white mark on their chest.


This breed is the result of the crossbreed between the Mastiff and the Bulldog, also giving it the name Bullmastiff. This breeding began in 1795 but was not successful until 1860, as an attempt to create a dog that had the Mastiff’s large size and the Bulldog’s courage. Originally used for poaching, this breed was later popular as a guard dog, used also in police and military work. It was not until 1924 that England’s Kennel Club recognized them as their own breed, leading to it being accepted by the American Kennel Club as well in 1933.


As puppies these dogs tend to be highly energetic and playful, as well as loud and expressive. As they get older, they will become more calm and quiet. They get along well with family pets but will become aggressive with strange animals and dogs of the same sex. They love children but, given their size, might accidentally harm them during playtime. Children should be taught to not pull their tail or disturb them as they eat, even though they are tolerant with children. If left alone for too long or become bored they might develop destructive behavior. They need their owner to establish their dominance as leader and be able to control it.


The Bullmastiff may suffer from many diseases, including various skin problems. They may also suffer from:

Entropion, which affects both lower eyelids, is an inward rolling of the eyelid and is treated through various surgeries to prevent ectropion (a rolling out of the eyelid).

Hip dysplasia, a hereditary disease in which there is an abnormal formation in the hip socket, that may eventually cause painful arthritis. It may also be affected by the environment they reside in.

Hypothyroidism, a disease that affects the thyroid gland, its symptoms are ear infections, skin infections, hair loss, lethargy, and depression.

Subvalvular Aortic Stenosis, which is a heart problem caused by unusually narrow attachment between the aorta and the left ventricle. It can be noticed through fainting and can eventually lead to death through heart failure.

Gastric dilatation-volvulus, or bloat, is a mortal disease in which large chested dogs are affected by eating quickly, drinking lots of water and exercising after. This causes the stomach to inflate with gas and twist, making the dog unable to get rid of the excess air through vomiting, which impedes the normal blood flow to the heart. Its blood pressure then goes down and the dog goes into shock. Without proper, and immediate, medical attention, this could be fatal. Its symptoms may include: retching without vomiting, bloated abdomen, excessive salivation, restlessness, depression, rapid heart rate, weakness, etc.

Cancer, noticeable through unusually swollen bumps, bleeding from any orifices, or sores that do not heal, along with difficulty breathing.

Panosteitis (Wandering or Transient Lameness), in which young dogs may have limping or other physical problems which can also be called Lameness. This is usually misdiagnosed for more serious problems, but the dog will most likely outgrow it by their second year. The cause is unknown, but a well balanced diet and rest if in pain may help your dog.

Cystinuria, which is a genetic disorder in which the kidney tubules are unable to reabsorb cystine, causing kidney or bladder stones that can block the urinary tract. It can be life threatening.


Their coat requires weekly brushing, especially during shedding season, and baths should only be given occasionally. Their ears should be checked regularly for any dirt to prevent infections, as well as their nails trimmed and teeth brushed. They need daily exercise, usually in the form of long walks, and a fenced yard to play in. They are not good running partners. Training should begin early in life as well as socialization, and is critical for the Bullmastiff. Owners should establish themselves as the leader and be firm but loving during training.


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