Saint Bermastiff

The Saint Bermastiff is a cross between the Mastiff and the Saint Bernard. Because each hybrid inherits a unique combination of traits from both parents, we recommend thoroughly researching both breeds before choosing a Saint Bermastiff. Pay special attention to temperament, health issues, and care requirements, as your dog may express characteristics from either parent breed.

Mastiff

Mastiff

The English Mastiff stands as one of the largest dog breeds in the world, distinguished by its massive size and powerful, muscular build. Males reach a minimum height of 30 inches at the shoulder and commonly exceed this standard, while females stand at least 27.5 inches tall. Weight is where the Mastiff truly demonstrates its enormity, with males typically ranging from 160 to 230 pounds and females from 120 to 170 pounds. Some individuals grow even larger, with the breed record holder, a Mastiff named Zorba, tipping the scales at an astonishing 343 pounds. This impressive mass is supported by a thick, well-muscled frame that reflects thousands of years of breeding for guarding and protection. The Mastiff's head is perhaps its most distinctive feature, being broad, heavy, and square in shape when viewed from any angle. A pronounced stop separates the forehead from the short, broad muzzle, and the face displays characteristic wrinkles across the forehead that become more pronounced when the dog is alert or attentive. The eyes are set wide apart and are relatively small compared to the massive head, conveying a kind and intelligent expression despite the breed's imposing appearance. The ears are small, V-shaped, and lie close to the cheeks, proportionately modest given the overall head size. The breed's coat is short, dense, and lies close to the body, providing adequate protection without requiring extensive grooming. Acceptable coat colors include fawn, apricot, and brindle, with all variations displaying the characteristic black mask that covers the muzzle and extends around the eyes. The darker pigmentation on the ears enhances the mask's effect. The Mastiff moves with a powerful, easy stride that belies its massive bulk, demonstrating both reach and drive despite being built more for strength than speed. Their tail is set moderately high, is wide at the base, and tapers to the end, reaching to the hocks when relaxed.

Key Characteristics

Temperament
Temperament Temperament Temperament Temperament Temperament Temperament While reserved and somewhat suspicious around strangers, well-socialized Mastiffs are neither shy nor aggressive. They tend to assess new situations calmly before reacting and rarely bark without reason, making them surprisingly quiet housedogs despite their size. The breed's energy level is relatively low, especially as adults, earning them a reputation as couch potatoes who are content with moderate daily exercise and plenty of rest. However, they still benefit from regular walks and mental stimulation. Mastiffs generally get along well with other pets when properly introduced, particularly if raised together from puppyhood. Their combination of loyalty, gentleness, and calm demeanor makes them excellent family companions for those with adequate space and resources.
Health Considerations
Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Cancer poses a significant concern for English Mastiffs, with osteosarcoma and mast cell tumors occurring more frequently in the breed than in many others. Degenerative myelopathy is a progressive neurological disease affecting the spinal cord that causes hind limb weakness and eventual paralysis, with no cure currently available. Eye problems including entropion, ectropion, cherry eye, and progressive retinal atrophy require monitoring and sometimes surgical correction. Cystinuria, a urinary condition that can cause stone formation, also affects the breed. English Mastiffs are prone to overheating due to their massive size and should be monitored carefully in warm weather. The breed has a relatively short lifespan of 6 to 10 years, and excessive drooling is a constant characteristic that owners must manage.
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Saint Bernard

Saint Bernard

The Saint Bernard is a giant breed that commands attention with its impressive size and powerful build. Males typically stand 28 to 30 inches at the shoulder and weigh between 140 and 180 pounds, while females are slightly smaller at 26 to 28 inches and 120 to 140 pounds. Some exceptional individuals can exceed 200 pounds, placing them among the heaviest of all domestic dog breeds. The breed possesses a massive, muscular body with a broad chest and strong legs that reflect its heritage as a rescue dog in the treacherous Swiss Alps. Their heads are large and imposing with wide skulls that give a distinctive blocky appearance, complemented by a short muzzle set about an inch below expressive brown eyes. Saint Bernards come in two coat varieties: shorthaired and longhaired, with the shorthaired variety being preferred historically by the monks who developed the breed at the Saint Bernard Hospice. Both coat types feature a dense double coat that provides excellent insulation in cold weather, a necessary adaptation given their mountain origins. The coat is predominantly white with markings that can include red, mahogany, brindle, or various shades of brown. Most Saint Bernards display the characteristic dark mask around their eyes and ears, adding to their noble expression. The skin on their forehead is moderately wrinkled, particularly when the dog is alert or attentive, enhancing their thoughtful appearance. The breed's physical features include long, floppy ears that lie flat against the head, a wide and open nose with well-developed nostrils, and powerful jaws with droopy jowls that contribute to their tendency to drool significantly. Their deep-set, kindly eyes convey the gentle nature that lies beneath their imposing exterior. Saint Bernards carry their thick, long tail low, raising it level with the back when excited or in motion. Despite their enormous size, they move with surprising grace and dignity, demonstrating a smooth, easy gait that belies their massive frame. The breed is not built for speed or extended physical exertion and requires careful management to prevent overheating, particularly in warm weather conditions.

Key Characteristics

Temperament
Temperament Temperament Temperament Temperament Temperament Temperament Saint Bernards are intelligent and eager to please, which makes them trainable despite occasional stubborn streaks. They require early socialization and consistent, positive training methods to develop into well-mannered adults. The breed has relatively low energy levels as adults, preferring leisurely activities over vigorous exercise, though they still need regular walks to maintain their health. They do not tolerate being left alone for extended periods and can develop separation anxiety if frequently isolated from their family. These sociable dogs are happiest when included in daily family activities and given opportunities to demonstrate their loyal, affectionate nature.
Health Considerations
Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Cancer, particularly osteosarcoma, occurs at higher rates in Saint Bernards than in many other breeds, with genetic factors playing a significant role. Wobbler syndrome, also known as cervical spondylomyelopathy, is a neurological condition affecting the neck vertebrae and spinal cord that can cause an unsteady gait. Eye problems including entropion and ectropion, where the eyelids roll inward or outward respectively, may require surgical correction. The breed is also prone to epilepsy and can develop skin conditions in their facial folds if not kept clean and dry. Saint Bernards have a relatively short lifespan of 8 to 10 years and are particularly susceptible to overheating due to their size and thick coat.
Learn More About The Saint Bernard

Important to Remember

Each hybrid dog is unique and may inherit any combination of traits from either parent breed. The information above represents the characteristics of the purebred parent breeds. Your Saint Bermastiff may favor one parent over the other or display a blend of both. We strongly encourage you to read the complete breed profiles for both the Mastiff and Saint Bernard to fully understand the range of possible temperaments, health concerns, and care requirements.