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.

Why Do My Cat’s Farts Smell Like Eggs? Our Vet Explains

Cat Stinky

Have you ever noticed that your cat’s farts smell like rotten eggs? Is there a way to prevent this unpleasant scent? That rotten egg odor is primarily due to sulfur compounds produced in the digestive process. When cats eat certain foods, especially those rich in fiber or specific types of carbohydrates, their digestion can lead to the production of gases that have a uniquely smelly odor.

divider 2 cats

Causes of Smelly Farts in Cats

Cats can have varying amounts of gas accumulate in their digestive systems, and certain factors can play a role in the production of odorous farts. Cats with sensitive digestive systems or food allergies can produce particularly stinky gas. Some cats may have difficulty digesting specific ingredients, leading to gastrointestinal distress and the production of gas.

Since cats are obligate carnivores, their digestive system is designed to efficiently process animal protein. So, dairy products, high amounts of carbohydrates or fiber, or low-quality ingredients can cause excess gas and smelly odors.

Many adult cats are lactose intolerant, meaning they have difficulty digesting lactose-containing foods properly. As a result, you may notice the unpleasant scent of rotten eggs. Sudden changes in your cat’s diet can lead to digestive upset, which can produce smelly farts. Eating spoiled food can also lead to a more prominent sulfur smell in their flatulence.

The microbes living in your cat’s intestinal system can impact the production of gases. A healthy microbiome can digest foods efficiently, thus producing less gas and pungent odor. Dysbiosis, or an imbalance of microbiomes, can produce smellier gas as a by-product of digestion, which is why you may notice a smell similar to that of rotten eggs. Medical conditions, such as infections, inflammatory bowel disease, or intestinal parasites, can upset normal digestion, leading to foul-smelling farts.

Other factors can influence flatulence, such as how fast your cat eats. Kitties that quickly gobble down their food can swallow air, which may lead to an excess of gas in their gastrointestinal tract.

woman with smelly cat
Image By: Jihan Nafiaa Zahri, Shutterstock

How to Prevent Your Cat From Having Smelly Farts

If your cat’s farts continue to be particularly smelly or occur in addition to vomiting or diarrhea, a checkup with your veterinarian may be worthwhile in order to rule out any underlying medical conditions or dietary indiscretions. It can be particularly useful to help you manage your cat’s diet and ensure a healthy digestive tract.

Dietary changes to include more high-quality protein depending on your cat’s age, health, and lifestyle can reduce excessive gas. All new diets should be slowly transitioned over a period of 7 to 10 days to prevent digestive upset. The addition of a species-specific probiotic can contribute to a healthy microbiome. Serving smaller, more frequent meals daily can also help digestion more than a single large meal.

Play and exercise can help your cat’s digestive system move along more efficiently. Aim for two 15-minute sessions per day.

Russian Blue Cat eating
Image By: slawomir.gawryluk, Shutterstock

divider 2 catsConclusion

Farts with foul smells resembling rotten eggs in cats can be attributed to various factors, such as their dietary choices, food intolerances or allergies, the condition of their microbiome, and their eating habits. Once you understand these factors, you can take appropriate steps to reduce stinky and potentially embarrassing odors from your cat.


Featured Image Credit: Stanislaw Mikulski, 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

IMHA in Cats: Signs, Causes & Care (Vet-Reviewed)

IMHA, or immune-mediated hemolytic anemia, describes a condition where the immune system misfires and breaks down the body’s red blood cells, a process...

Can You Get Rabies from a Cat Scratch? Vet-Reviewed Facts & FAQ

Rabies is a disease that used to be relatively common among domestic animals, including dogs, ferrets, and cats. It’s possible for any mammal,...

7 Cat Breeds With Very Short Legs: Vet-Approved Info & Pictures

Is it possible to make a cat even more adorable? Just the thought of them playing and doing what kittens do best— i.e.,...

How to Foster a Cat: 10 Steps to Follow

Providing a loving, calm, and caring home to a cat in need is an incredibly rewarding experience, both for you and your little...

More related

Siberian Cat vs. Ragdoll Cat: Main Differences (With Pictures)

With so many incredible cat breeds to choose from, which feline would make the best pet for you? Two of our favorites are...

Can Fleas Kill a Cat? Vet-Approved Facts & Safety Guide

Fleas are an annoying part of cat ownership. Unfortunately, your cat will likely get at least one flea infestation at some point during...

Is Dracaena Toxic to Cats? Vet-Reviewed Houseplants Examined

Having live houseplants adds a nice touch to your home and helps to keep your air clean, but our feline companions do enjoy...

Is Cat Panting Normal? Our Vet Explains

We are all familiar with the sight of a happy hound, tail wagging and tongue lolling, panting to cool down on a hot...

Keep reading

Can Cats Eat Diatomaceous Earth? Vet-Verified Safety Tips & Warnings

Nowadays, we seem to be moving toward natural, organic, and integrative ways to combat disease—not only in humans but also in our kitties. If you have been looking for holistic ways to treat fleas and worms in your cat, you...

Can Cats Eat Diatomaceous Earth

Will a Humidifier Help a Cat with Congestion? Vet Reviewed Facts & FAQ

We all have childhood memories of having a cold, being congested, and our moms dragging out and plugging in the humidifier to loosen up the congestion and help us breathe. In fact, most of us have done it for our...

cat sitting near humidifier

How Much Time Should You Spend With Your Cat? Vet-Approved Advice

We all have busy lives, so we’re constantly trying to carve out time to spend with our family and friends and still have quality alone time. When you own a cat or multiple cats, you need to spend time with...

young cat owner playing with her pet at home

Can Cats Eat Apple Pie? Vet Reviewed Advice

Apple pie is a popular dessert, and the smell alone will attract any hungry and curious pet. If you catch your cat sniffing around the pie dish, you may be tempted to share a slice, or if your cat has...

Can Cats Eat Apple Pie

Understanding Lost Cat Behavior: Vet-Reviewed Feline Personality Factors

If your cat goes missing, knowing their personality may help you find your cat. Knowing their habits can guide you to specific search areas and toward effective strategies for finding a frightened cat that has been missing. If you don’t...

Feral cats eating on stone path

Can Cats Eat Animal Crackers? Vet Reviewed Facts

Picture the scene: You’ve stolen a few minutes to enjoy some animal crackers, and your cat comes over, settles at your feet, and gives you the “eyes” or a swipe at your hand if you’ve got a feisty feline. We...

Can Cats Eat Animal Crackers

Why Do Cats Pee When Scared? 2 Reasons for This Behavior

If you’re a cat owner, chances are that you don’t see your cat pee anywhere but the litter box. Sometimes, though, you may notice that cat urine is on the floor or the couch, and your cat is nowhere to...

Cat Owner Hold Cat Car Scared

How to Make Dry Cat Foods Soft: 6 Vet-Approved Methods That Work

Some owners prefer to feed their cats dry food, whether as a solitary source of food or in addition to wet food meals. Because kibble is dehydrated, cats on a kibble diet should be drinking water to prevent dehydration. However,...

orange cat eating wet food