How Much Do Puppies Sleep At 8 Weeks At Night. For puppies catnaps have gone to the dogs because young dogs need 18 to 20 hours of sleep per day to rest their developing brains. By 16 weeks they should have begun sleeping through the night.

If you are lucky your puppy may be able to make it through the night during this stage. You can expect your puppy to sleep for about six to ten hours a night. An 8 week old puppy can be expected to spend around 18 to 20 hours asleep out of every 24.
On average 8 week old puppies sleep 20 hours a day including naps throughout the day and 14 16 hours at night.
One minute your puppy may be a miniature tornado and the next he s fallen soundly asleep almost mid dash. Expect your young puppy to sleep a lot during this stage. They are likely to sleep after a period of activity and then wake up refreshed ready to play again. Puppies sleep a lot during the day just like babies.