Puppies sleep a lot to support their rapid growth and development. Here is a detailed overview of how long puppies typically sleep by age:

• Newborn puppies (less than 2 weeks old) sleep about 90% of the time, which is roughly 20 to 22 hours a day. They spend most of this time sleeping or nursing, as they are still developing their senses and body functions

• Puppies aged 8 to 12 weeks generally need around 18 to 20 hours of sleep per day. At this stage, they are more active but still require extensive rest to develop motor skills, coordination, and brain function. They tend to sleep in multiple naps throughout the day and may sleep 6 to 8 hours at night

• Between 14 to 16 weeks , puppies still sleep about 18 hours daily, though their growth rate slows slightly. Their awake periods gradually increase, and they become more agile and social

• Around 4 to 5 months old , puppies start sleeping less—about 14 to 16 hours a day—with longer awake periods and fewer but longer naps

• By 6 months , puppies' sleep patterns begin to resemble adult dogs, averaging about 12 to 14 hours of sleep daily

Puppies are polyphasic sleepers, meaning they take several naps throughout the day, typically lasting from 30 minutes to 2 hours. Their sleep includes cycles of REM and non-REM sleep, important for brain development and processing new information

. In summary, very young puppies sleep up to 20-22 hours daily, gradually decreasing to about 12-14 hours by six months as they mature and become more active