Curled paws signal serious work. A puppy may sleep for 18 to 20 hours across a day, not because it lacks ambition, but because infancy packs feeding, movement, learning, and tissue growth into a body with little reserve. Their sleep is scattered, often arriving just after play or a meal. Those naps are a biological schedule, not a failure of stamina.The nap earns its keep. During REM sleep and slo...More