The French Mastiff, which only lives five to eight years, has the smallest life expectancy of any breed on this list.
The typical lifespan of these gentle giants is six to eight years, which is not very lengthy.
The BMD Club of America reports that the Bernese's life expectancy has suddenly dropped from 10 to 12 years to barely 6 to 8 years.
The Irish wolfhound has a six to ten year life expectancy, which is a little greater than the Bernese but still less than normal.
Neapolitan mastiffs are brachycephalic, just like the Dogue de Bordeaux, and have breathing issues. They have an eight to ten year lifespan on average.
The average life expectancy in Newfoundland is eight to ten years.
Rotties also have a lifespan of eight to ten years. These canines that are linked to mastiffs are predisposed to bone cancer, which typically has a dismal prognosis once it is discovered.
The bulldog, one of the few medium-sized canines on our list, lives for roughly eight to ten years.
The Saint Bernard follows closely behind with a life expectancy of eight to ten years. one of the largest breeds of dogs
The Leonberger has an eight to nine-year lifetime and some of the same health problems that affect most larger breeds, including cancer and bloat.