Dogs can be such a mysterious creature.  I absolutely love observing how they interact with their handlers
I love dogs.  Do you know anything about search and rescue dogs?  
Indeed, I own a German Shepherd. They are well versed for search and rescue.
St. Bernard (dog)
The St. Bernard or St Bernard (, ) is a breed of very large working dog from the western Alps in Italy and Switzerland. They were originally bred for rescue by the hospice of the Great St Bernard Pass on the Italian-Swiss border. The hospice, built by and named after Italian monk Bernard of Menthon, acquired its first dogs between 1660 and 1670. The breed has become famous through tales of alpine rescues, as well as for its enormous size.
Appearance.
Jindo dogs are not fit as rescue dogs and search dogs. It is because Jindo dogs' hunting instincts are too strong (they can forget their mission because of their hunting instincts), and they usually give their loyalty only to the first owner, while handlers of search dogs and rescue dogs can frequently change.
In 2010, Son Min-suk (손민석), a member of Korean Security Forum, wrote that most of Korean military dogs were German Shepherds, and that Jindo dogs were not fit for military dogs