Are Great Pyrenees nocturnal?

No, Great Pyrenees are not strictly nocturnal, but they exhibit more alertness and activity during evening and nighttime hours compared to other breeds. This behavior stems from their background as livestock guardian dogs, where they would patrol and protect their flocks during the night when predators are more active.

With proper training and conditioning, Great Pyrenees can adapt to a diurnal lifestyle and be active and alert during the day while resting at night, particularly when living in a domestic setting where their primary role is that of a family pet.