The Greater Swiss Mountain Dog, a dog of great strength, was originally a herding dog, but was later used for draft. It may have been the advent of mechanized vehicles, combined with the rise in popularity of the Saint Bernard Dog (the Greater Swiss Mountain Dog Helped produce the Saint Bernard Dog), that led to the decline in popularity of the GSMD. However it happened, the breed was believed to be extinct, or nearly so, by the turn of the 20th Century.
In 1908, an owner named Franz Schertenlieb entered his mountain dogs in the Swiss Kennel Club (SKG) jubilee conformation dog show, knowing that they would be seen by an expert in native Swiss dogs, Dr. Albert Heim. Dr. Heim, an avid fancier, was apparently delighted to find a living example of the Großer Schweizer Sennenhund, and exhorted the members of the Kennel Club to do all that they could to safeguard the breed, including scour farms and villages for healthy specimens for a breeding program.
His suggestion was acted upon, and a careful breeding program was begun. Due to the meticulous nature of the selection process, the lack of worthy brood bitches, and the requirement that all puppies be reexamined as adults for conformation and temperament before being certified as suitable for breeding, breed numbers grew slowly.
