The typical life expectancy of these gentle giants is six to eight years. The primary health problem of the breed is bloat.
The BMD Club of America reports that the Bernese's life expectancy has recently decreased from 10 to 12 years to only 6 to 8 years.
At six to ten years, the Irish wolfhound has a little higher life expectancy than the Bernese, although it is still shorter than normal.
The Neapolitan mastiff is a brachycephalic breed that has difficulty breathing, especially in warmer temperatures. The usual lifetime is between eight and ten years.
Newfoundlanders have a life expectancy of roughly eight to ten years. Bloat and heart failure in the form of subaortic stenosis are also common among Newfies.
Rotties have a life expectancy of eight to ten years. These mastiff-related canines are susceptible to bone cancer, which has a dismal prognosis once discovered.
The bulldog, one of the few medium-sized canines on our list, has an average lifetime of eight to ten years. English bulldogs have a number of health issues.
The Saint Bernard has a life expectancy of eight to ten years as well. The Saint, one of the biggest dog breeds, has a slew of health issues.
The bullmastiff, another member of the mastiff family, lives an average of eight to ten years.
The Shar-Pei, the second medium-sized breed on our list, may live between eight and eleven years. Breeding has produced serious health issues for this canine.