How many hours do dogs sleep by age? 2026 chart: puppies 18-20hrs, adults 12-14hrs, seniors up to 18hrs
"My dog sleeps 12+ hours a day — is that normal?" It's one of the most common questions dog owners ask. Here's your direct answer. No detours.
According to AKC Chief Veterinarian Dr Jerry Klein and multiple veterinary sources, here are the sleep standards by age.
Quick answer: How many hours do dogs sleep by age?
| Age | Daily sleep | Is this normal? |
|---|---|---|
| Puppies (2-6 months) | 18-20 hours | ✅ Normal — brain and body development require lots of sleep |
| Adult dogs (1-7 years) | 10-14 hours (avg 12 hours) | ✅ Normal — varies by breed and activity level |
| Senior dogs (8+ years) | 16-18 hours | ✅ Normal — energy declines, more rest needed |
| Any age over 20 hours | ⚠️ Needs attention | If still lethargic after waking, consider contacting your vet |
If your dog's sleep falls within this range, and they wake up alert, willing to eat, and happy to interact — they're most likely fine.
Direct answers to what you're searching for
| What you're searching for | Direct answer |
|---|---|
| "How many hours a day do dogs sleep?" | Adult dogs average 12 hours, range 8-16 hours |
| "My dog sleeps 20 hours a day" | If they wake up alert, it might just be laziness. If still groggy after waking, it's worth monitoring |
| "How many hours does a 12 year old dog sleep?" | 16-18 hours is normal range; over 20 hours needs attention |
| "How much should senior dogs sleep?" | 16-18 hours — large breeds may sleep more |
Why are dogs naturally "sleepy"?
Different sleep patterns. Dogs spend only about 10% of their sleep in REM (deep sleep), compared to about 25% for humans. They spend most of their sleep in a light state, ready to wake up and alert at any moment, so they need longer sleep duration to compensate for less deep rest.
Breed differences. Large and giant breeds (like Great Danes and Mastiffs) typically sleep more than smaller breeds — some large-breed dogs can sleep up to 18 hours even in middle age. AKC Chief Veterinarian Dr Klein notes that flat-faced breeds are more prone to sleep-disordered breathing, which reduces sleep quality and leads to more daytime drowsiness.
Age is the biggest variable. Puppies' developing brains require enormous amounts of sleep, while senior dogs need more rest as their bodies slow down.
Is 16-18 hours of sleep normal for senior dogs?
Yes, it's normal.
Dr Amber Karwacki, a veterinarian for Chewy, states clearly: "It's normal for senior dogs to sleep 16-18 hours a day." With only 24 hours in a day, that means senior dogs spend the vast majority of their time sleeping.
As dogs age, their energy levels naturally decline, they tire more easily, and they need more rest. Like humans, senior dogs experience changes in sleep quality — they may wake up more often at night and sleep longer during the day.
However: if it's a "sudden" change to 16-18 hours — meaning their sleep pattern has noticeably shifted — that's worth paying attention to.
When should you be concerned?
Dr Jerry Klein's (AKC Chief Veterinarian) key advice: if a dog is sleeping more than 20 hours a day, or more importantly — if their sleeping pattern has changed significantly — it could signal an underlying health issue.
Here are some signs worth paying attention to:
1、Still lethargic after waking
Sleeping a lot in itself is not a problem. But if your dog remains groggy while awake, and is slow to respond to sounds or food — that's not normal.
2、 Sudden change in sleep patterns
A dog that normally sleeps 12 hours a day is fine. But if they suddenly start sleeping more than 18 hours, and their sleeping pattern has clearly changed — that usually signals a problem.
3、Accompanied by other symptoms
If lethargy appears with any of the following, it's worth monitoring:
1、Loss of appetite or weight changes
2、Drinking and urinating significantly more
3、Vomiting or diarrhoea
4、Walking slower or difficulty getting up — could be arthritis pain making them avoid moving
5、Coughing or breathing difficulties
4、 Sleeping all day, but awake all night
Senior dogs especially — if they sleep all day but pace around at night and can't settle, it could be an early sign of canine cognitive dysfunction (CCD) — similar to Alzheimer's in humans. Purina UK notes that over 60% of dogs over 11 years of age show at least one sign of cognitive dysfunction.
What health issues could cause excessive sleeping?
Veterinary sources indicate that lethargy can be an early sign of several conditions:
1、Arthritis: Moving is uncomfortable, so they prefer to rest — this may be the most common physical reason for increased sleep in senior dogs
2、Hypothyroidism: Slowed metabolism causes lethargy, weight gain, and hair loss
3、Diabetes: The body can't use glucose effectively, leading to fatigue
4、Heart disease: Reduced pumping efficiency leads to oxygen deficiency and fatigue
5、Kidney disease: Toxin buildup in the body makes them feel tired
6、Cognitive dysfunction (CCD): Disrupted sleep-wake cycles — sleeping all day, restless at night
Two simple ways to check
First, observe their "waking state."
If they wake up alert, willing to eat, willing to go for a walk — even a short one — it's usually fine. If they remain drowsy, unresponsive, and won't even touch their favourite treat — it's worth keeping an eye on.
Second, compare against disrupted daily routines.
Your dog used to get up for a walk at a certain time — now they won't. They used to eat at mealtime — now they ignore the bowl. They used to greet you at the door — now they stay lying down. If these daily routines have been disrupted, that often tells you more than "how many hours of sleep" alone.
Final thoughts
Dogs sleeping a lot is normal. They naturally need more sleep than humans.
But if you notice your dog sleeping significantly more than usual, having no energy even when awake, or if it's paired with loss of appetite or weight changes — don't just chalk it up to "getting old" or "being lazy."
Puppies sleeping a lot means "growing." Senior dogs sleeping a lot means "getting older and needing rest" — both are normal. But an adult dog suddenly jumping from 12 hours to 18 hours, or waking up still exhausted — that is not normal.
Your dog can't tell you what's wrong. But how much they sleep, and how they are when they wake up, will tell you whether they're truly comfortable.
References
1、Dogster. How Long Do Puppies Sleep? Vet-Reviewed Facts & FAQ. 2025.
2、Chewy. My Senior Dog Sleeps All Day — Is This Normal? 2025.
3、AKC. Too Much Sleep: Is There Such a Thing for Senior Dogs? 2019.
4、Purina UK. Understanding Your Senior Dog's Sleeping Habits.
5、Dogo App. Let Sleeping Dogs Sleep. Puppy Sleep Routine. 2024.
6、PetMD. Why Do Dogs Sleep So Much?
7、Tractive. Why Do Dogs Sleep So Much? And When Is Too Much? 2025.
8、Great Pet Care. My Senior Dog Sleeps All Day: Is This Normal? 2022.
9、Pets at Home. Dog Sleep Guide.
10、Spot Pet Insurance. Puppy Sleep Schedule. 2026.
11、Dogo App. How many hours do puppies sleep? 2026.
