Why do Cats Sleep so Long On average, cats sleep about 16 hours a day, which equates to about two-thirds of their life. In fact, cats get more sleep than virtually any other animal, about twice as much as most mammals.
Welcome to Healthypet.com! It's a natural instinct for cats to sleep most of the time. It's an adaptation they developed in order to survive in the wild. Wild cats are hunters and predators. They are generally active only at times when there is food available. For short periods during the day they will hunt; the rest of the day, they conserve their energy by sleeping, eating, and just resting.This is why your cat seems to have only two settings: "high speed" and "off." Lazing in the sun is just as much average kitty behavior as racing around the house and attacking everything in sight.

Studies have shown that cats can enter into a deep sleep like us, and have similar brain wave patterns as we do when we dream. ..your cat asleep, whiskers twitching, and the eyes under the closed lids rapidly moving to and fro..