Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

How to Tell If My Cat has a Fever: 10 Vet-Reviewed Signs

Share

man holding himalayan cat

For us, it’s easy to tell if we have a fever by feeling our foreheads or using a thermometer. Unfortunately, it’s not as simple as a pet parent when you think your cat is sick and might have a fever. It’s also important to note that the average temperature in cats isn’t the same as the normal temperature in humans. A cat’s normal temperature runs between 100.4 to 102.5 degrees Fahrenheit.

So, how can you tell when a cat has a fever? There are a few likely signs to watch for. In the guide below, we’ll discuss them and what you can do to reduce the fever.

divider cat paws oct 2024

When to Seek Vet Advice

If you suspect your cat is suffering from a fever or any sickness for a prolonged period, are concerned for their wellbeing, or simply want to discuss their health, you should contact a vet directly for an assessment. They can provide you with more information, advice, and a care plan.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

How to Tell If Your Cat Has A Fever

1. Lack of Interest in Playing/Normal Behavior

One of the most common signs that your cat is sick and has a fever is a lack of interest in playing or participating in everyday activities. If your cat’s behavior changes drastically, they could be sick, have a fever, and need to be seen by a vet.

While there are many reasons a cat might not be acting normal, this is one of the signs to be on the lookout for if you’re concerned that your cat might have a fever.


2. Lethargy

As with humans, a fever is your cat’s body’s way of fighting off an infection. Whether the infection is viral or bacterial, the body fights it by raising the cat’s internal body temperature by activating their immune system.

Having no energy and being lethargic are very common side effects of having a fever and are among the main signs that your cat has one and might need to see a vet as soon as possible.

tired sick cat lying on bed
Image Credit: Natata, Shutterstock

3. Lack of Appetite

While a lack of appetite is a sign of several conditions, it is a common sign of a fever. If you find that your cat is refusing food, it’s best to make an appointment with your vet for a diagnosis and to get to the root of the problem.

Cats sometimes have days where they don’t eat as much as on other days. However, if they refuse the food they usually love, it could be a cause concern.


4. Hiding or Staying Away from Others

As a pet parent, you already know that cats are, by nature, programmed to survive. So when they get sick, they go off on their own or hide from others so as not to be vulnerable to attack.

In the wild, cats are vulnerable to attack from larger predators when they are sick. If your cat is feeling bad, they may hide away from others until they’re feeling well again.

cat lying on the floor hiding behind the curtain
Image Credit: Mantikorra, Shutterstock

5. Grooming Decreases

Cats are very meticulous and clean animals, and if your cat stops grooming, something is wrong. Healthy cats can be seen grooming themselves quite often.

If you notice your cat isn’t grooming, make an appointment with your vet to diagnose a possible underlying condition. Cats don’t stop grooming themselves for no reason, and a fever will make them feel bad enough that they don’t feel like it.


6. Breathing Rapidly

A cat that is breathing rapidly is a cause for concern, and you need to contact your vet for an appointment right away. The same goes for panting. If your cat is panting or breathing rapidly, they could have a fever or an underlying condition requiring quick medical attention.

If you can’t get in touch with your vet right away, it’s best to take your cat to the emergency vet clinic instead, especially if your cat is mouth-breathing.

a tabby cat panting on hot weather
Image Credit: Sari ONeal, Shutterstock

7. Shivering & Chills

Like humans, a cat that is shivering or has chills likely has a fever. It is a telltale sign that your cat is sick, and you need to take them to the veterinary clinic.


8. Rapid Heart Rate

A rapid heart rate and rapid breathing go hand in hand with a cat having a fever. A cat’s resting heart rate isn’t the same as a human’s; their heart rate should be between 120 to 160 beats a minute.

A fever can cause their heart rate to increase. If your cat’s resting heart rate gets to 240 beats a minute, it’s time to get them to an emergency vet immediately.

yellow sad sick cat
Image Credit: Nikolay Bassov, Shutterstock

9. Drinking Less Often

Drinking water is as essential to a cat’s health as it is to a human. A fever can cause your cat to not only lose their appetite but to drink less often as well. Dehydration can easily and quickly set in, which can be dangerous for your pet.

Keep a close eye on your feline, and if they seem to be drinking fewer fluids, it’s time to contact a vet.


10. Temperature is 102.5 Degrees or Higher

digital thermometer showing a cat has a fever
Image Credit: Evgeniy Kalinovskiy, Shutterstock

One sign that your cat is sick with a fever is if the thermometer reads 102.5 degrees or higher when you check their temperature. A pediatric thermometer is the easiest way to check your cat’s temperature. The temperature should be taken in the rectum. If the cat’s temperature reaches over 106 degrees Fahrenheit, you must seek help immediately, as your cat’s organs can start shutting down at this high temperature.

These are just a few of the signs you’ll likely see if your cat has a temperature. In our guide below, we’ll give you a few causes of fevers in cats and a little bit on how to care for your feline friend as they recover.

divider cat paws oct 2024

Causes of Fever in Cats

There are a few different reasons your cat might be suffering from a fever.

We’ll list a few of them for you below:

  • Viral infections
  • Bacterial infections
  • Toxins or poisoning
  • Cancers or tumors
  • Injuries
  • A metabolic disorder
  • Fungal infections
  • Parasites
  • Environmental causes
  • Autoimmune disorders

These are the main causes of cat fevers. If you suspect your cat is suffering from a fever, you should contact your vet directly for an assessment. They can provide you with more information and a care plan.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

How to Care for a Cat with a Fever

You should never give your cat medication for a fever. Cats don’t need to take human medicine since it can make them even sicker. In fact, you should never give medication to your pet without getting your vet’s approval.

If you discover or suspect that your cat has a fever, your vet will help you devise a treatment plan, including making sure that your cat doesn’t become dehydrated while it’s sick.

After the vet visit, the best thing you can do for your furry friend is to pamper them, let them sleep, and patiently wait for them to get better. Love also helps, so don’t forget to give your cat plenty as they recover!

divider cat paws oct 2024

Conclusion

This concludes our guide on how to tell if your cat has a fever. Remember, if your cat does have a fever, there could be several causes for the underlying illness they might have. It’s best to contact your vet to determine what the problem is and to get a treatment plan that works and will have your little feline friend feeling better in no time at all.

Related Reads:


Featured Image Credit: Suthin Saenontad, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Why Chicken Bones Are More Dangerous for Cats Than Most Parents Realize

Chicken bones seem harmless enough, but for cats, they can cause serious damage quickly. Whether your cat swiped a piece off the counter...

Fantastic Pet Pantries and Where to Find Them

Let’s face it: times are really tough right now, and those of us in the 99% are struggling with the cost of just...

Ask Dr. Paola – Help! My Cat Refuses to Drink Water! (April 13, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Healthy Cats Still Vomit Sometimes (And How to Respond)

A cat that just vomited needs a specific kind of care, and the feeding decisions you make in the next few hours actually...

More related

5 Signs of Aggression in Cats: Vet-Reviewed Behavior Problems to Watch For

Aggression is a relatively common feline behavior problem, and it can have several causes, from pets getting a bit too carried away while...

What Does Cat Food Taste Like? Interesting Facts to Know

It isn’t accurate to describe the taste of cat food based on our human tongues. Cats lack many of the taste receptors humans...

Can Cats Eat Chorizo? Vet-Reviewed Facts & FAQ

If you enjoy sausages and salami, chances are that you enjoy chorizo. If you’ve been adding chorizo to your meals on occasion and...

Can I Flush Cat Litter? Vet-Reviewed Facts & FAQ

Dealing with your cat’s litter is probably one of the least pleasant elements of having a feline companion. If you live in an...

Keep reading

Do Cats Eat Less in Summer? Vet-Approved Seasonal Feeding Guide

Have you ever noticed that when winter comes, you start to eat more and crave heartier foods, while when summer rolls around, you move more and eat less? Believe it or not, cats may also eat less food in the...

Bengal cat beside food

How to Get a Picky Cat to Eat: 9 Vet-Reviewed Tips

While many cats enjoy their food a bit too much and happily gobble up everything in sight, others are choosier regarding what they eat. Cats can be put off by something about their food, like its flavor or texture, but...

Tabby cat eating food from white bowl

Nom Nom Cat Food Review: Recalls, Pros, Cons & Verdict

Disclaimer: Nom Nom has discontinued its fresh cat food recipe and is no longer taking orders. Nom Nom hopes to return to providing fresh food to cats in the future when they have more readily available high-quality ingredients. We have...

Nom Nom Cat Food

Can Cats Eat Roast Beef? Vet Reviewed Benefits & Concerns

It is difficult to ignore the urge to spoil our pets. After all, we do it all the time for ourselves, so we want to give our lovely cat a tasty treat from our plate. But before you give human...

Can Cats Eat Roast Beef

Why Does My Cat Paw at Smooth Surfaces? 5 Vet Reviewed Reasons

As you know, cats love to explore and get into all kinds of trouble doing so. Their curiosity is one of the things we love most about them, but pouncing on that weird bug or chasing that dangling string can...

Bengal cat pawing at the window

Friskies Cat Food Review of 2026: Recalls, Pros & Cons

Review Summary It might be one of the oldest pet food brands out there, so is Friskies a good cat food? The company was founded in 1934, which was only a few decades after the pet food industry began to...

Friskies Pate Cat Food Review

Why Do Cats Trill & What Does It Mean? Vet-Verified Feline Vocalization Facts

Cats make quite a few different noises, and one of the cutest that we’ve ever heard is trilling. This is a blend between a meow and a purr, and each cat can make their own distinctive version of this sound....

cat meowing

Vitamin B12 for Cats: 7 Vet-Approved Food Sources

Vitamin B12, or cobalamin, is an essential nutrient for cats, having a vital role in multiple key body functions and processes. Cats cannot produce B12 and must get it from their food instead. Keep reading to learn about great food...

cat eating food in the bowl

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.