The Great Pyrenees began as a livestock guardian in the mountains between France and Spain, where big white dogs stayed with flocks and drove off wolves, bears and thieves. Adults are giant, usually 85 to 120 pounds, with a thick double coat, a plumed tail and double dewclaws on the hind legs.
That history explains the personality. Many Pyrs are calm, gentle and devoted at home, but they were bred to decide things alone, so they can be independent, slow to obey and loud at night. Heavy shedding comes with the breed, and in South Florida the coat also means a dog that hunts for cool floors and shade. Dogs vary, and Pyr mixes are common, so the dog you meet may be smaller or less guard-minded.