Most adult dogs sleep 8-13.5 hours a day. Puppies need more sleep than adult dogs as their bodies and brains are developing. Puppies up to three months of age sleep 20 hours a day.
As puppies grow, the amount of time they spend each day sleeping declines. Older puppies (16 weeks old) need 11-14 hours of sleep a day. By the time a puppy turns one year old, it settles into the sleep routine of an adult dog.