They share many characteristics of many livestock guardian dog breeds such as the Great Pyrenees. Her devotion and dedication to Great Pyrenees continued for more than fifty years. Great Pyrenees need to have their nails clipped often to avoid damage. Great Pyrenees have a double coat, and will shed their undercoat. The Great Pyrenees were introduced in America by General Lafayette in 1824. In nature, the Great Pyrenees is confident, gentle (especially with children) and affectionate. Like similar breeds, some Great Pyrenees tend to drool, especially with exercise, heat or stress.