Giant dog breed
A giant dog breed is a breed of dog of gigantic proportions, sometimes described as a breed whose weight exceeds . Breeds sometimes described as giant breeds include the Great Dane, Newfoundland, St. Bernard and Irish Wolfhound. These breeds have seen a marked increase in their size since the 19th century as a result of selective breeding. Dog breeds described as giants tend to have more health problems than smaller dogs and have the shortest life expectancy of all dog breeds.