Abnormal Behaviour in Guinea Pigs

Since we can’t speak our guinea pigs’ language, it’s not always easy to determine exactly what they’re feeling or why they’re behaving in a certain way.

But that’s not to say that they don’t communicate and if you pay attention long enough, you’ll eventually master the art of understanding what your guinea pig’s behaviour means and how your guinea pig is feeling.

To understand if your guinea pig is exhibiting behaviour that’s concerning and abnormal, we first have to understand what’s classed as normal guinea pig behaviour in the first place.

Normal Behaviour

While there may be some things that your guinea pig does that look strange, a lot of it is actually perfectly normal.

1. Sleeping with eyes open

Guinea pigs are prey animals, so they have to be alert and ready to move at a moment’s notice. This often means that they sleep lightly, so lightly in fact that their eyes stay open. It’s pretty normal and even though it looks a bit weird, it’s nothing to worry about.

2. Eating their poo

Despite it being rather disgusting, guinea pigs do eat their own poo, and it’s pretty common. It’s relatively healthy for them to do this since their faeces is still full of nutrients, and it’s nutrients that they haven’t managed to digest the first time around. But this isn’t to say you should allow their pen to come dirty and full of faeces.

3. Dragging their behind on the floor

Your guinea pig is doing this to mark their territory, and this might happen if you’re placing them in a new cage, there is a new guinea pig, or you’ve cleaned the cage. Don’t worry; this is perfectly normal; it just looks odd.

5. Jumping in the air (popcorning)

Generally, this is a behaviour that you want to see happening since it usually means they’re happy and excited. If they’re doing it all the time, however, they have a lot of excess energy so it might be a good idea to think about some toys and activities that they’ll enjoy.

6. Strange sounds

From purring and squeaking to wheeking and rumbling… guinea pigs make the strangest noises, and they’re often just expressing natural feelings that are apart of every day guinea pig life such as excitement, annoyance and even seduction. If you want to know more about this, check out the full range of guinea pig noises and what they mean here.

7. Chasing

In a pack of animals, there will always be a fight for dominance, and more often than not, this is settled easily. Guinea pigs understand there is a hierarchy, and many are happy to fit within it. If chasing is occurring, this is a sign of dominance and happens in both males and females. It’s usually nothing to worry about, and unless there is real harm taking place (bullying, depriving others of food, wounds from biting), then it’s fine.

If it’s occurring between a male and female, then it’s also a good idea to check that they’re are definitely neutered – just to be on the safe side.

8. Peeing on other guinea pigs when annoyed

Like all families, guinea pigs annoy one another, and as a sign that they want the other guinea pig to back off, they can spray pee on one another. Yeah, it’s pretty gross but also pretty standard; it’s just their way of letting each other know they’re not in the mood.

9. Nipping

This one can get a little grey because excessive nipping can turn into bullying, and that’s not okay. However, the occasional nip is okay if one guinea pig needs to tell their fellow piggy to leave their food alone. Just watch out for how often it’s happening and whether it’s always the same guinea pig doing it.

10. Head raising with an open mouth

Once again, a sign of dominance, surprising, right? You wouldn’t think guinea pigs would be so narky given how cute they are, but yes, a lot of their behaviour is to display dominance in group situations. This is another case of it being perfectly fine and normal so long as it’s not occurring all the time.

Guinea pig in twinkling lights

Abnormal Behaviour

1. Chewing the bars

Guinea pigs do chew everything in sight, but if they’re constantly chewing the bars, this could be a sign of frustration and boredom. Is their environment providing enough stimulation for them? They should always have a fellow guinea pig with them, and they should have enough room, accessories and toys for mental stimulation. If you’re looking for ideas on how to entertain your guinea pig, check out our list of the top 10 guinea pig toys that every piggy needs.

2. Lack of movement

If your guinea pig is lethargic and reluctant to move or is often crouched in a hunched position, then this is a sign that something is wrong. Guinea pigs are usually social and active, so if they’re not exploring the area a lot, this could be a sign of illness, pain, depression or anxiety.

3. Change in eating, drinking and toilet habits

If you have noticed that your guinea pig is eating less as well as drinking less or drinking much more, then this is a sign something is up. It could be illness-related, depression-related, or another guinea pig could be bullying them. You should weigh your guinea pig every week anyway because it’s not always easy to detect that they’re losing weight.

However, if you’ve noticed a change in their diet, then it’s essential to take them to see a vet. The same goes for their toilet habits, such as diarrhoea or a complete lack of urination and poo.

4. Repeated circling of their enclosure or overgrooming

These are signs of stress which could be down to illness, frustration, boredom, loneliness, or bullying from another guinea pig. It’s important to monitor these behaviours along with other warning signs mentioned. If it continues, you should look at changing something in their environment or monitoring the interactions between your piggies. If this kind of behaviour continues, it’s best to speak to your vet.

5. Feezing, fidgeting when you’re handling them

If a guinea pig feels safe and relaxed around you, they’ll usually lie down, stretch out and settle calmly. If they’re stiff or constantly trying to get away, as you’ve guessed it, they’re scared and uncomfortable. Try being calm, gentle and quiet around your pig, and let them get used to being around you before you pick them up.

6. Frequent fighting

The occasional push is okay; after all, there will always be a dominant guinea pig. However, when this turns to biting and rolling around, then it’s harmful and abnormal group behaviour. If it’s the same two guinea pigs, then you may need to split them up. Excessive biting is also a sign that a guinea pig may be in pain, especially if they’re biting you too.

7. Shrieking  and excessive teeth chattering

These are the noises that definitely aren’t normal. Excessive shrieking and teeth chattering are signs of a very agitated guinea pig. Shrieking is a high pitched noise that usually means your guinea pig is upset or distressed about something. While excessive teeth chattering is a sign of irritation and aggression so you may want to consider if you’re handling your guinea pig in a stressful way or if their environment is causing anxiety. Do they have enough space away from other guinea pigs? Is there enough to stimulate them in the cage?

8. Spending a lot of time hiding

It’s natural for guinea pigs to enjoy hiding; it’s instinct to get away from predators. But like with all behaviours, moderation is key. If your guinea pig pretty much refuses to come out from hiding, then you can incur that they’re in pain, or they feel threatened by their environment. This requires looking at ways to make your guinea pig feel safer and calmer as well as looking at the way they interact with other guinea pigs, and again, it may also we worth paying a visit to the vets.

Final Note

If you want to know more about your guinea pig then check out our guinea pig care guide. And as always, if you’re concerned about any strange behaviour that your guinea pig is exhibiting then it’s always wise to talk to your vet about it. They will be able to give you a better understanding of how to resolve the problem in a specialised and in a way that’s tailored to your little buddy.

Best of luck from the team at Petz!