Saint Bernard
The Saint Bernard is a massive, gentle giant originally bred by monks at the Great St. Bernard Hospice in the Swiss Alps for rescue work in deep snow, where the breed saved over 2,000 travelers across nearly three centuries. Known for their enormous size — often exceeding 150 lbs — kind expression, and patient temperament, Saint Bernards are among the most recognizable breeds in the world. Despite their imposing stature, they are remarkably gentle, affectionate family dogs whose calm demeanor and natural love of children have earned them the nickname 'nanny dog.'
8–10
years lifespan
140–180
lbs (male)
28–30
inches tall (male)
low
energy level
Temperament
How Old Is Your Saint Bernard in Human Years?
Use our breed-specific calculator to find out, plus get personalised health and care guidance for your dog’s exact age.
Open Saint Bernard Age CalculatorCommon Health Conditions
Gastric Dilatation-Volvulus (Bloat/GDV)
A life-threatening emergency where the stomach distends with gas and rotates, cutting off blood supply to the stomach and spleen while compressing major blood vessels. Saint Bernards are among the very highest-risk breeds due to their giant size and deep, broad chest. GDV can progress to fatal cardiovascular shock within 1-2 hours. The breed's enormous body size makes emergency surgery more complex, and recovery can be more difficult than in smaller breeds.
Typical onset: 2–10 years
Hip Dysplasia
Abnormal hip joint development causing malformation of the ball-and-socket joint, leading to progressive arthritis, pain, and mobility loss. Saint Bernards have one of the highest rates of hip dysplasia among all breeds, with studies showing over 45% of Saints evaluated by OFA having some degree of dysplasia. The combination of rapid growth, extreme body weight, and genetic predisposition makes this the breed's most prevalent orthopedic condition.
Typical onset: 0.5–2 years
Dilated Cardiomyopathy (DCM)
A disease of the heart muscle where the chambers enlarge and the walls thin, reducing the heart's ability to pump blood effectively. Saint Bernards are genetically predisposed to DCM, which progresses from asymptomatic heart enlargement to congestive heart failure. The condition often develops silently, with no outward signs until the heart is significantly compromised. Regular cardiac screening is the only way to detect early-stage DCM.
Typical onset: 4–8 years
Osteosarcoma (Bone Cancer)
An aggressive malignant bone tumor that primarily affects the long bones of the limbs. Giant breeds are significantly overrepresented, and Saint Bernards are among the most commonly affected. Osteosarcoma is highly metastatic, with microscopic spread to the lungs often present at the time of diagnosis. The disease typically causes sudden, severe lameness and limb pain. Treatment options include amputation with chemotherapy, limb-sparing surgery, or palliative care.
Typical onset: 6–9 years
Entropion and Ectropion
Entropion is an inward rolling of the eyelid causing the lashes to rub against the cornea, while ectropion is an outward sagging of the lower eyelid exposing the conjunctiva. Many Saint Bernards have a combination of both conditions — ectropion centrally with entropion at the corners (a condition called 'diamond eye'). The breed's heavy facial skin, loose jowls, and deep-set eyes make eyelid abnormalities extremely common and often require surgical correction.
Typical onset: 0.5–2 years
Lifespan Factors
The median lifespan for a Saint Bernard is 9 years. Key factors that influence longevity:
- bloat (gastric dilatation-volvulus)
- hip and elbow dysplasia
- dilated cardiomyopathy
- osteosarcoma (bone cancer)
- entropion and ectropion
When Is a Saint Bernard Considered Senior?
Saint Bernards are generally considered senior at around 6 years of age. At this point, you should increase vet visits to twice yearly and watch for age-related health changes.
Check your Saint Bernard’s age in human years →