The Great Pyrenees is a very old breed, thought to originate about 10,000 years ago. They were used as guard dogs during wartime and to protect livestock in peacetime. They are a very popular livestock guarding dog and family pet, and despite the Great Pyrenees’ size and their protective instincts, they are generally gentle giants that are good around children and small animals. They are one of the few livestock guarding dogs that thrive in either role, as a pet or guard dog, being able to bond with sheep or with people. They will instinctively guard whatever they bond with. For this reason, many people feel they should only be allowed to bond with the livestock they will be guarding and not humans. This is not very practical when you need to handle your dog, and the good news is, Great Pyranese can be trained to bond with and protect sheep, and also bond with and obey their human handlers.
The Great Pyrenees' personality is a bit of an enigma. They naturally exhibit strong guarding behavior for whatever or whomever they are bonded to and also submissive gentle behavior with what they are guarding. They will be aggressive with predators or threats to the sheep they are guarding, rushing at, growling, barking and intimidating, wolves, coyotes or other dogs. However, trained with adult sheep, Pyrenees will behave submissively, gaining the sheep's trust and eventually living with and protecting the sheep. They generally are gentle and get along well with children and small animals, such as cats, ducks, and chickens, which is important on a farm where family and livestock need to be able to move about unthreatened, while still being protected. The Pyrenees’ unique ability to combine aggression towards threats, generally other canines, and submissiveness towards livestock makes their behavior ideal for working on a farm and protecting sheep.
Many young Pyrenees dogs are trained to guard sheep by association with other mature livestock dogs. It is best to train a Pyrenees with another Pyrenees, as their guarding behavior and bonding instincts are different from most other dog breeds, and an appropriate model for behavior is another Pyrenees that has already become established in a flock. To bond with sheep, several mature sheep that are not easily intimidated are generally used in controlled environments, such as smaller pens with the young Pyrenees, to allow bonding to take place.