Here's a breakdown:
* Puppies: Sleep even more, up to 18-20 hours a day.
* Senior dogs: May sleep a bit more than their younger counterparts, often 14-16 hours.
* Breed: Some breeds tend to be sleepier than others. For example, Bulldogs and Basset Hounds are known for their love of naps.
* Activity level: Highly active dogs may sleep less, while less active dogs might sleep more.
Other factors that can influence sleep:
* Age: Puppies and senior dogs need more rest.
* Health: Illness or injury can cause increased sleepiness.
* Environment: A comfortable and quiet environment promotes sleep.
Important note: While most dogs sleep a lot, a dog that sleeps excessively or has unusual sleep patterns could be a sign of an underlying health issue. If you are concerned about your dog's sleep habits, it's best to consult with a veterinarian.