The Bernese Mountain Dogs have a tendency to develop CHD, cell tumors, gastric torsion and elbow Dysplasia as they age. Some minor areas of concerns can be in the form of SAS, entopion, ectropion and cataracts. In rare occurrences they can be known to develop PRA, vWD, allergies, overactive thyroid, hypomyelination and hepatocerebellar degeneration. The vet may recommend screening for their hips, elbows, eyesight, cardiac screening and testing for their vWD and DNA as well. Be very cautious with this breed in warmer climates as they are quite sensitive to heat stroke. The average lifespan for a Bernese Mountain Dog is on the short side between six to nine years long. They generally weigh between seventy and one hundred and twenty pounds as full grown canines.