Do Guinea Pigs Sleep With Their Eyes Open? Reasons Why and Other Sleep Habits

Guinea pigs are known for some intriguing behaviors, like their sleep patterns. A common question among owners is about their tendency to sleep with their eyes open. Indeed, guinea pigs often doze with their eyes partly open, which makes it tricky to tell if they’re sleeping or just taking a break.

In this blog, we’ll uncover the curious case of guinea pigs sleeping with their eyes open and explore the protective instincts behind this behavior, along with other fascinating sleep habits.

Why Do Guinea Pigs Sleep With Their Eyes Open?

It’s a peculiar sight: a guinea pig seemingly wide awake and yet fast asleep. This trait might seem odd, but there’s a reason why guinea pigs often sleep with their eyes open. Understanding this behavior sheds light on their unique biology and survival instincts.

Natural Instincts

an alert guinea pig

This habit of sleeping with eyes open isn’t just about comfort — it’s an instinct from their days in the wild. Originally from the Andes mountains, guinea pigs had to be on constant alert for predators. Although today’s domestic guinea pigs live in much safer environments, these instincts persist. 

By sleeping with their eyes open, guinea pigs were able to spot threats quickly and make a fast getaway if needed.

The Harderian Gland

In tandem with their natural instincts, the Harderian gland, which is located behind their eyes, plays a crucial role in a guinea pig’s ability to sleep with their eyes open.

As guinea pigs blink as little as 2 to 5 times every 20 minutes, the protective, oily substance secreted by the gland becomes vital during sleep. It allows them to keep their eyes partially open without risk of dryness or irritation, thus supporting their need for constant alertness even during rest.

Seeing your guinea pig sleeping with their eyes fully closed in your presence is a sign of trust. It indicates that your furry friend feels safe and secure with you, a true testament to the bond you’ve built and the comfortable home you’ve provided.

Understanding the Sleep Habits of Guinea Pigs

Guinea pigs have adapted unique sleep strategies that are both fascinating and functional. While their open-eyed rest might catch your eye, their varied sleep patterns and positions are equally important to understand. These elements of guinea pig behavior offer insights into their state of alertness and comfort.

Sleep Cycles

Guinea pigs are unique in that they’re neither nocturnal nor diurnal; their sleep is characterized by multiple brief naps day and night. This sporadic sleeping pattern, along with their ability to sleep with one eye open, ensures they remain alert to any changes in their environment — a crucial adaptation from their days in the wild where constant vigilance was necessary for safety.

Sleeping Positions

guinea pigs huddling together asleep

Guinea pigs’ sleeping positions can tell us a lot about how they’re feeling and their level of comfort in their environment. Here’s what some of their common sleeping postures indicate:

Sleeping upright with their eyes open

When guinea pigs snooze on their feet with eyes open, they’re in a light sleep mode, still alert and ready to react to potential threats. It’s their way of resting while staying prepared.

Sleeping with their head down

If a guinea pig rests with their head tucked down, they may be seeking darkness or trying to create a cozy spot for a more comfortable rest.

Huddling together

Guinea pigs often sleep snuggled up with their mates as a way to bond and share warmth. This behavior suggests a strong social connection and can also be a sign they’re seeking reassurance.

Lying on their side with eyes closed

This position indicates a deep level of trust and relaxation. If your guinea pig sleeps like this, it means they feel extremely safe and secure in their surroundings, sometimes even considering you a part of their ‘herd’.

How to tell if your guinea pig is sleepy
Curious about when your guinea pig is ready to hit the hay? Look for these telltale signs that they’re gearing up for a good nap:

  • Chirpy sounds: A sleepy guinea pig might make gentle chirping sounds as they wind down.
  • Cozy corner circling: Watch for your little friend scouting out the perfect nap nook, often going in circles to get it just right.
  • The big yawn: Just like us, a guinea pig may yawn widely when they’re tired—more than just a jaw stretch, it’s a signal they’re ready for some rest.

  • Tips to Help Guinea Pigs Sleep Better

    Ensuring your guinea pig gets plenty of restful sleep is crucial for their health and happiness – sleep allows them to digest and absorb nutrients efficiently. Here’s how you can help your furry companion get the quality sleep they need.

    Set Up the Ideal Sleeping Environment

    setting up the ideal sleep environment for guinea pigs

    Creating a sleep sanctuary for your guinea pig involves more than just a quiet corner; it’s about making their entire habitat conducive to relaxation. Consider adding accessories to your guinea pig’s cage that create shadowed areas, mimicking the sheltered spots they would seek out in the wild for security and rest. 

    The right temperature (above 15°C) and comfortable bedding for your guinea pig are also key factors — strive for cozy bedding with materials like fleece or cotton that they can snuggle into.

    But, crafting a peaceful sleep setting is about more than just the right bedding; it’s about considering all aspects of your guinea pig’s surroundings. Here are some other things you can do to set up the ideal sleeping environment for your guinea pig:

    Keeping the volume down

    Just as we enjoy peace for a good night’s sleep, so do guinea pigs. Placing their cage in a quiet area away from daily commotion can prevent startling disruptions.

    Regular cleaning of the cage

    A well-maintained cage is synonymous with tranquility for your guinea pig. A consistent cleaning schedule ensures their home is a haven for rest.

    Letting natural light in

    While guinea pigs aren’t nocturnal nor diurnal, they rely on light changes to regulate their sleep cycles. Thus, allowing natural light in during the day and keeping it dim at dusk can help your guinea pig adjust to their environment and regulate their sleep behavior naturally.

    Do not cover the cage up for the night

    Covering a guinea pig’s cage at night can shield them from noise and light for better sleep. However, fully covering the cage can lead to complete darkness and possible anxiety for your pet, as they rely on subtle light changes to maintain their natural sleep cycles. 

    Instead of covering the cage entirely, opt for a partial cover that reduces sensory stimuli while still allowing a sense of security and connection to the surrounding environment. This approach can help your guinea pig feel safe and undisturbed as they rest.

    Keep Your Guinea Pigs Busy

    Crafting a peaceful sleep setting goes beyond nighttime preparations; it’s about ensuring your guinea pig has a fulfilling and active day. Here are some ways to improve your guinea pig’s sleep quality:

    Offer a stimulating environment to play in

    Guinea pigs are active creatures, typically needing only 4 to 6 hours of sleep a day. To make the most of their waking hours, provide a stimulating environment with ample space to roam. A large cage and a secure run area are essential for them to exercise and play.

    Make use of enrichments and cage accessories

    guinea pigs in cages

    In addition to having a large enough cage to run in, a stimulating cage setup with tunnels, chew treats, and hideaways prevents boredom and encourages activity. These elements keep your guinea pig engaged and active, ensuring they’re pleasantly weary by bedtime.

    Spend quality time with your guinea pigs

    Remember, guinea pigs are social animals and enjoy interaction. Spending time playing and cuddling with your guinea pig can help them feel content and secure, promoting a restful state when it’s time to sleep.

    By addressing both their physical and emotional needs throughout the day, you’re not just enriching their waking hours—you’re also setting the stage for a more restorative sleep, vital for their well-being.

    FAQs About the Sleeping Habits of Guinea Pigs

    Unlike humans, guinea pigs average about 4 hours of sleep each day, usually in brief stretches. To help them get the rest they need, provide a comfortable environment with the right bedding, temperature, and light. A quiet, cozy space encourages healthy sleep cycles for these little creatures.

    If your guinea pig is sleeping more than usual, it could indicate that they're feeling unwell. Excessive sleep can be due to age, stress, or health issues. 

    If they're also less interested in food or seem down, it's best to consult a vet. Conditions like bacterial pneumonia can cause lethargy and appetite loss, so a check-up is recommended.

    Sleeping with your guinea pig isn't safe. The size difference poses a risk — you might accidentally hurt them during your sleep. Guinea pigs also don't sleep through the night and might wander off, risking falls or injuries. It's better to place their cage near your bed if you want them close.


    • Wai Ling


      Foodie at heart and (almost) always with a camera in hand. When she's not busy with work, you'll find her munching around Singapore or snapping pics in some cool new spot.

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      Bubble tea and sleeping are two of Emilia's favourite things. She also enjoys cooking and loves to experiment with new recipes for different cuisines.


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