The Great Pyrenees is confident, gentle (especially with children), and affectionate. While territorial and protective of its flock or family when necessary, its general demeanor is of composure and patience and loyalty. It is a strong willed, independent and reserved breed. It is also attentive, quite fearless and loyal to its duties. The Great Pyrenees’ size makes it an imposing guardian. A dog of this breed will patrol its perimeter and may wander away if left off its leash in an unenclosed space. The Great Pyrenees protects its flock by barking, and being nocturnal, tends to bark at night unless trained against such behavior.