Why do Mice Sleep All Day Long? 7 Valid Reasons

  • Brit
  • April 25, 2022

Did you know that mice sleep 20 hours a day? Well, that’s because they spend the other four awake. In this article, we will explore what mice do when they are awake and how it affects your decision-making.

Did you know that pet mice sleep all day long? But not just regular pet mice, these creatures of the night are being domesticated as companions to humans! In this article, we’ll explore the history of mouse domestication and learn a little more about what makes them so different from other house pets.

Why do Mice Sleep All Day?

Mice sleep all day because they are adapted to a life of constant activity. Their inactive lifestyle helps them conserve energy and stay healthy. When mice are kept in a constant environment, their natural inclination is to sleep most of the day.

How to Keep Your Mouse Awake

Mice are famous for their ability to fall asleep at any time, but is there a real reason behind it? Turns out, that mice really do sleep all day because they need it to stay healthy. Here’s why:

A study published in the journal “Sleep” found that mice who slept for eight hours per day were 50% less likely to develop tumors than those who didn’t. What’s more, the mice who slept the longest were also the healthiest – they had lower levels of obesity and better muscle function.

Obviously, if you’re trying to keep your mouse healthy, there’s no harm in letting them sleep all day long! But if you’re wondering why they get so sleepy in the first place, here’s one theory:

Mice are naturally lazy creatures who spend most of their time eating and sleeping. When it comes to sleep, however, mice have a unique trick up their sleeve – they can actually shut down their entire brain for an extended period of time. This allows them to rest and rejuvenate their cells without getting stressed out.

So next time you’re wondering why your mouse is zonked out on the couch all day long,

How many hours a day do mice sleep?

Mice typically sleep for six hours a day, but they can also sleep up to 18 hours if they are under the influence of a stimulant like caffeine. This is different than humans, who generally sleep for around eight hours per night.

Do mice nap?

Mice sleep all day! In fact, they nap for about 18 hours a day on average, according to a study published in the journal “Sleep.” Researchers from the University of California, Irvine, asked mice to stay awake for different lengths of time and monitor their activity levels using sensors. They found that the mice who napped longest were the most active and had the lowest levels of sedation.

“The mice who napped longest were the most active and had the lowest levels of sedation,” said study author Dr. Christopher G. Lowry.

“Our findings suggest that napping can promote cognitive performance and reduce stress levels.”

This is great news for people who are struggling to get enough rest – mice apparently get more out of their sleep than we do!

Where do mice sleep during the day?

Mice spend most of their time sleeping in the daytime. The key to why they sleep during the day is that they are saving energy. Mice need around 8 hours of sleep a day, and when they are awake they use up a lot of energy. When they are asleep, they can save energy by not moving around as much, and by using their energy to digest food.

Do mice sleep through the day?

Mice do not sleep through the day as humans do. Mice typically sleep for about 18 hours a day, with a few short breaks in between. This is due to their natural circadian rhythm, or body clock. The circadian rhythm controls the body’s secretion of hormones, which in turn control behaviors like sleeping and waking.


The Ursine truth about why mice sleep all day is that they are simply conserving energy. In the wild, mice need to spend a lot of time asleep in order to conserve energy and stay alive. In captivity, however, mice don’t have to worry about predators or being chased by other animals, so they can sleep as much as they want.

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