How Much Is Too Much Sleep for a Dog?
- Most dogs sleep 12–14 hours a day, including 8 hours at night and 2–4 hours in daytime naps.
- Sleeping 20 or more hours daily is considered excessive and may signal underlying issues.
- Excessive sleep is linked to lower stress levels, but prolonged inactivity can reduce activity and mental stimulation.
Normal Sleep Patterns in Dogs
Dogs typically sleep around 12 to 14 hours per day, with about 8 hours at night and 2 to 4 hours of daytime napping. This aligns with natural sleep cycles that include both deep non-REM and REM sleep, similar to humans. Puppies, who are learning and exploring more, may need up to 18 to 20 hours of sleep daily due to higher energy expenditure.
When Sleep Becomes Excessive
Sleeping 20 hours or more per day is considered excessive and may indicate a health or behavioral concern. According to one study, dogs that sleep 20 hours or more daily have the lowest stress point values (14.7), suggesting they may be less active or less engaged. However, this extreme sleep duration is not typical for healthy, active dogs and could reflect illness, low energy, or lack of stimulation.
Sleep vs. Rest: What’s the Difference?
Dogs spend about 7 hours a day lying around awake, not sleeping, but simply resting. This time is part of their natural rhythm and includes lounging after meals or exercise. True sleep (including REM cycles) is essential for memory and learning. Dogs need about 10% of their sleep to be REM, which supports cognitive function.
The Impact of Activity and Rest Balance
Dogs should ideally be active for about 5 hours a day, including walking, exploring, playing, and socializing. After activity, they need relaxation periods of 20 minutes to an hour to help consolidate learning and reduce stress. If a dog sleeps more than 17 hours daily, it may be compensating for overactivity or stress. However, consistent sleep beyond 20 hours should prompt a vet check.
Signs to Watch For
While sleep is natural, excessive napping—especially when paired with lethargy, loss of appetite, or disinterest in play—can be a red flag. Dogs that sleep 20+ hours daily may be under-stimulated or unwell. Ensure your dog has a balanced day with activity, rest, and mental engagement to support overall well-being.
Frequently asked questions
Is it normal for my dog to sleep 16 hours a day?
Yes, 16 hours is within the upper end of normal for many dogs, especially if they are resting or napping. However, if this is a sudden change, consult a vet.
Should I worry if my dog sleeps 20 hours?
Yes—sleeping 20 or more hours daily is excessive and may indicate illness, low energy, or lack of stimulation. Evaluate activity levels and consult a professional.
Sources
- How Dogs Work A Head-to-Tail Guide to Your Canine · Daniel Tatarsky · Chapter 30
- Stress in Dogs - Learn How Dogs Show Stress And What You Can Do To Help · Martina Scholz, Clarissa von Reinhardt · Section on Resting Phases
- Stress Release For Dogs The Canine Emotional Detox · Diane A. Garrod · Chapter on Relaxation Periods
⚠️ Important: this article is a literature summary, not a case diagnosis. Every dog is different — breed, age, and history all affect the plan. For severe anxiety or aggressive barking, contact a certified behavior trainer or veterinary behaviorist.