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.

Pneumonia in Cats: Causes, Signs & Care (Vet-Approved Explanation)

Share

sick cat in vet

Cats rely on healthy lungs to breathe normally, just as humans do. Any health condition that impacts the lungs’ ability to function is potentially dangerous for the cat, and pneumonia is one of the medical concerns. In this article, we will discuss what pneumonia is and what causes the disease in cats. We will also discuss the most common signs of pneumonia and how it’s treated, including what care you can expect to provide your sick kitty at home.

divider cat paws oct 2024

What Is Pneumonia?

By its simplest definition, pneumonia is an infection of the lungs. The inflammation leads to trouble breathing and insufficient oxygen in the cat’s blood. When healthy, the cat’s lungs push air in and out of the body, a process known as ventilation. Once inside the lungs, oxygen from the air is removed and replaced with carbon dioxide, which needs to leave the body.

The cat breathes out the waste carbon dioxide while the oxygen passes into the bloodstream and is distributed throughout the body. Pneumonia impacts lung function because it disturbs the vital oxygen distribution. The inflamed lungs often contain biological material like blood or fluid, which blocks oxygen from passing into the blood.

When inflamed, the lungs may not expand enough and limit the amount of air the cat can breathe in. A lack of oxygen in the cat’s blood impacts every body part and can be life-threatening if not treated quickly.

Sick cat in animal hospital
Image Credit: Kachalkina Veronika, Shutterstock

What Are the Signs of Pneumonia in Cats?

Some signs of pneumonia vary slightly depending on what’s causing your cat’s lung inflammation.

Here are some common early signs of pneumonia:
  • Open mouth breathing
  • Lethargy
  • Fever
  • Coughing
  • Breathing faster
  • Breathing more heavily
  • Loss of appetite

Your cat may also display signs of not feeling very well, such as a loss of appetite and lethargy. If your cat’s pneumonia progresses, you may notice more concerning signs, such as breathing with their mouth open and a bluish color to their gums.

What Are the Causes of Pneumonia in Cats?

Because the term pneumonia describes generalized lung inflammation, it’s essential to determine precisely what is causing that inflammation for effective treatment.

There are four leading causes of pneumonia:
  • Aspirating (breathing in) something other than air
  • Something infectious like bacteria or a virus
  • Fungus
  • Parasites

Aspiration pneumonia occurs when the cat inhales something foreign, such as vomit, medication, or food. Unlike air, the cat can’t breathe the substance back out, so it remains in the lungs, blocking the oxygen’s movement. Cats that are sedated or under anesthesia are also at risk of the condition because the gag reflex doesn’t function when they’re knocked out.

Upper respiratory viruses are common in cats and can sometimes spread to the lungs, causing pneumonia. Cats with feline leukemia or feline immunodeficiency virus (FIV) are more at risk for pneumonia because of their weak immune systems.

Bacteria can also cause pneumonia, possibly when an infection somewhere else in the body moves to the lungs from the bloodstream. Cats with viral pneumonia can develop a bacterial infection as a complication. Fungal pneumonia is uncommon in cats but does occur. Generally, an infection occurs when the cat inhales fungal spores that develop naturally in the soil.

Parasitic pneumonia is even rarer in cats. It’s caused by lungworms and generally only impacts stray and outdoor cats.

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

How Do I Care for a Cat With Pneumonia?

The proper care for a cat with pneumonia will vary depending on the type of pneumonia and how sick they are. The first step is getting your cat to the veterinarian to diagnose the pneumonia. Your vet will listen to your cat’s lungs and ask questions about their health history, including whether they could have aspirated anything.

They may suggest other tests, like chest X-rays and bloodwork, to check for viral diseases. Sometimes, your cat will need specialized procedures to diagnose fungal pneumonia or determine the specific type of bacteria causing an infection. If so, your vet may refer you to a specialist if one is available in the area.

Once pneumonia is diagnosed, the next step is for your vet to determine how sick your cat is and whether they can be treated at home or in the hospital. Very sick cats may need IV fluids, medications, and oxygen to recover.

If your vet catches pneumonia early, you may be able to treat your cat at home. If a virus causes pneumonia, there is usually no effective medication. You must keep your cat warm and ensure they continue eating and drinking normally. Your vet may ask you to count your cat’s breathing rate several times daily and call or come back to the hospital if it increases.

You’ll generally need to give antibiotics or anti-fungal medications at home for bacterial and fungal infections. Drugs to calm inflammation and open the airways are sometimes prescribed. In the rare case of parasitic pneumonia, your cat will need medications to kill the lungworms.

Pneumonia can worsen before it gets better, so if you care for your cat at home, monitor them carefully. Successfully treating pneumonia can be a long process that does not end until the cat’s lungs are clear. Your vet may want to recheck chest X-rays multiple times before confirming that the pneumonia is gone.

divider 2 cats

Frequently Asked Questions (FAQs)

Is Pneumonia in Cats Contagious?

Fungal, parasitic, and aspiration pneumonia are generally not contagious. Occasionally, bacterial or viral pneumonia may be contagious to cats and dogs. Your vet will advise you whether you need to keep the sick cat separated from other pets while they recover.

You must also avoid letting the sick cat share dishes, toys, or other items. Some infectious causes of pneumonia can spread through these methods. After caring for your sick cat, wash your hands to avoid carrying germs to healthy pets.

Can Pneumonia in Cats Be Prevented?

Bacterial and viral pneumonia usually can’t be prevented. Keeping your cat indoors will minimize their risk of encountering parasites or fungi. Don’t let your cat dig in the soil of indoor potted plants, either.

One common cause of aspiration pneumonia is inhaling liquid medication. Many cats are hard to medicate, and the risk of inhaling the liquid increases if it’s difficult to administer. If you give your cat liquid medicine, do so slowly to give them time to swallow.

divider 1 paws

Conclusion

Any condition that harms a cat’s breathing ability can be frightening for an owner. Pneumonia is life-threatening if left untreated. As with most medical problems, the earlier treatment can begin, the better. If you suspect your cat has pneumonia, see your vet immediately. Anytime your cat has trouble breathing, treat it as a medical emergency and get to the closest vet!


Featured Image Credit: SeagullNady, Pixabay

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.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

The Surprisingly Simple Ways to Help a Cat With Hairballs

Cats spend an astonishing amount of time grooming. It is part hygiene routine, part comfort ritual, and part instinct that traces back generations....

What a CATastrophe! A Tire-ing Ordeal For a Pony in the UK

As you would expect, our weekly news updates are usually centered around feline topics – we are a cat care website after all...

Ask Dr. Paola – Help! My Cat Has Stopped Eat His Wet Food! (June 1, 2026)

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

Chatting About Fake News in the Pet World, AI Again, and New Age Journalism | Chatty Cattys, Episode 23

Navigating the modern digital landscape requires a sharp eye to distinguish fact from fiction. In this episode of Catster’s podcast, Chatty Cattys, Nicole...

More related

Composting Cat Poop: Vet-Verified Guide & Tips

Owning cats has several impacts on the environment. From the toys you provide your little hunters to the food you offer them, everything...

MILK Books Pet Photo Album Review 2026: High-Quality Keepsakes Of Companions

These days, there are a lot of photo book printing options, many of which have special layouts made for pet parents. But if...

What Your Cat’s Breed Says About You: Personality Traits Explored

Studies show 1 that a cat owner’s personality can impact the disposition of their pet. Cat owners scoring high in the openness personality...

All Aboard: Meet the Huddersfield Train Station Cats

Cats have long been employed as pest control in barns, churches, and warehouses. As we recently covered, you can even adopt specific working...

Keep reading

Are Cat Cafés Good or Bad for Cats? Vet Reviewed Guidelines

Any cat lover would be attracted to the idea of visiting a cat café, where they can make new furry friends while sipping their favorite coffee. While it sounds like a fantastic idea, and the popularity of cat cafés is...

cat cafe in thailand

How to Keep Cats Warm in Winter: 7 Vet-Approved Methods

If you own a cat, you might be wondering if they easily get cold. You may have observed them hiding under a blanket, sitting by a heater, or snuggling up with you to stay warm. If you would like to...

Devon Rex kitten on a white fluffy blanket

Cat Peeing in Front of the Litter Box? 14 Vet-Reviewed Solutions to Try

Discovering a little puddle of cat pee in front of the litter box can be frustrating, but your cat is not doing this on purpose! When we dig deeper into the reasons that cats pee in front of, instead of...

Bengal cat sitting aside of a litter box staring at it

Can Cats Eat Potato Chips? Vet-Verified Nutrition & Health Advice

You settle down in front of the TV, open your bag of potato chips, and crunch your way through your favorite salty snack. However, your cat is sitting at your feet giving you “Puss n’ Boots” eyes and you wonder...

Can Cats Eat Potato Chips

Can Cats Eat Ham? Vet-Approved Health Benefits & FAQ

Since felines are obligate carnivores, their diet primarily consists of meat. They require certain essential nutrients that can only be found in animal products. And one of those products is ham. If you’re wondering whether it’s safe for your cat...

Can Cats Eat Ham

Cat Pedicures: What’s Involved? Vet-Approved Facts & Explanation

Our kitties might need a little extra love in the nail department. These lethal murder mittens can do quite a lot of damage. If you’ve shared your home with a feline, you know just how much it can impact your...

Cat in a veterinary clinic hairdresser cutting nails

8 Vet-Verified Ways to Be an Eco-Friendly Cat Owner in 2024

Owning a pet takes a lot out on the environment. After all, our pets have needs too, and these needs require resources that we must take from the environment. Therefore, if you want to live in balance with the planet...

cat playing with owner

10 Flea and Tick Diseases in Cats: Vet-Verified Facts & FAQ

Living with cats means you will, at some point, have to deal with fleas and potentially ticks. Although we often talk about them in the same breath, they are quite different. Fleas are smaller and have six legs while ticks...

domestic-cat-with-skin-desease

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.