Age is a major factor in how much a dog sleeps. Just as it is with people, a dog's sleeping patterns change throughout his life cycle, with more or less sleep needed at different stages of life. Healthy adult dogs in their prime of life generally average about 14 hours of sleep each day. Young puppies generally need 18 to 20 hours, while aging dogs also tend to sleep longer the older they get. Dogs who have a lot to do generally sleep less.
https://www.cuteness.com/blog/content/do-some-dogs-need-more-sleep-than-others
Dogs love to sleep. On average, dogs sleep about 14 hours a day, although some sleep more than others. How much a dog sleeps depends on several factors, including age, breed and environment. A dog's breed can influence how much time it spends sleeping.
https://www.cuteness.com/blog/content/do-some-dogs-need-more-sleep-than-others
In fact, cats sleep an average of 15 hours a day, with some snoozing for up to 20 hours per 24-hour period. The only animals that get more slumber are bats and possums. Cats are crepuscular animals, which means that they’re most active between dusk and dawn.
https://sleep.org/tag/animals/
Puppies sleep 18 hours or more per day. Even adult dogs sleep more than humans do, as much as 12 hours per day. In addition they take several naps during the day. It's important to offer both your puppies and adult dogs the opportunity to have calm time to rest during the day.
https://www.quora.com/How-many-hours-a-day-does-a-dog-sleep
The average dog sleeps for about 12 to 14 hours per 24-hour cycle. That’s just the beginning, though. Puppies, who expend a lot of energy exploring and learning may need as much as 18 to 20 hours. Older dogs also tend to need more rest, as do certain breeds.
https://sleep.org/articles/how-much-do-dogs-sleep/
Take a look at just how much time the big cats spend snoozing below. How Many Hours Do Most Lions Spend Sleeping? Male lions spend 18 to 20 hours a day snoozing, while females get 15 to 18 hours of shuteye. The lionesses spend more time hunting and taking care of cubs, which is why they get slightly less sleep.
https://sleep.org/tag/animals/
Scientists and pet experts aren’t sure why dogs doze so much, but it’s typically how they spend at least half of their day. One theory: Unlike humans who generally stay up all day and then sleep for one long stretch at night, spending as much as 25 percent of their sleep in Rapid Eye Movement (REM) Click to learn more sleep, dogs’ shorter sleep stints mean just about 10 percent of their snoozing is REM.
https://sleep.org/articles/how-much-do-dogs-sleep/
Large breeds, such as mastiffs and Saint Bernards, generally spend a lot of time sleeping — up to 18 hours a day. True, dogs do sleep more than humans, but they don't sleep as soundly as we do. When they sleep and how much they sleep depends on the level of activity in their lives.
https://www.quora.com/How-many-hours-a-day-does-a-dog-sleep
Most pet owners won’t have to worry about their fur ball getting too few winks, but dogs and cats occasionally do need more shuteye. How Much Sleep Does My Pet Need? On average, dogs sleep about 14 hours a day (though large breeds may sleep more), while cats spend 15 to 20 hours snoozing (yes, be jealous). Dogs tend to nap during the day and sleep through the night, while cats get most of their shuteye during daytime hours….
https://sleep.org/tag/animals/
One Eye Open. Like people, cats either doze in a light sleep or sleep very deeply. When your cat dozes (which lasts about fifteen minutes to a half hour), he will position his body so that he can spring up and into action at a moment’s notice. During deep sleep, cats experience rapid (or quick) brain movement. Deep sleep tends to last about five minutes, after which the cat goes back to dozing.
http://www.petmd.com/cat/behavior/evr_ct_why_do_cats_sleep_so_much
how many hours a day do dogs sleep
Dogs sleeps for 14 hours a day. Dogs sleep 14 hours a day.