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.

7 Surprising Facts About Cat Stomachs (Vet Verified)

Share

A man hand strokes a cat on a sore stomach

Obviously, cats have stomachs, but that doesn’t necessarily mean that they work the same as ours. While you might have heard some of the facts below already, we’re sure that there are a few cat stomach facts that might surprise you. If you’re wanting to learn more about how your feline friend’s digestive system works, particularly when it comes to their tummies, keep reading.

divider 2 cats

The 7 Facts About Cat Stomachs

1. Cats Only Have One Stomach, and It Isn’t Very Big

Some people believe that cats have more than one stomach. Whether that’s because someone simply gave them the wrong information or because they mistook the primordial pouch for an extra tummy, it’s simply not true.

Cats only have one stomach, but surprisingly, it’s pretty small—roughly the size of a ping pong ball. This means that the average cat’s stomach can only hold about 2–4 tablespoons of food at a time. However, cats can also gorge themselves on meals, which is why you sometimes see them regurgitate their food immediately after eating it.

cat digestive system
You are free to use this image but we do require you to link back to Catster.com for credit

2. Their Stomachs Can’t Digest Hair

Cats have a complex digestive system, and for animals that are known to digest small prey, you’d think they’d be able to digest hair too, but that’s not completely true. When cats groom themselves, which makes up 30–50% of their day, they also swallow large amounts of hair. This hair often comes back up in the form of hairballs.

The reason for this is because hair is made of keratin, which is a fibrous structural protein that is resistant to a cat’s digestive system. Instead of being fully digested, it either passes through the intestines and is excreted or is regurgitated as a hairball.


3. Eating Several Small Meals Throughout the Day Is Easier on the Stomach Than Eating One Large Meal

In the wild, a typical feral cat might eat seven or more meals throughout the day. Again, their stomachs are small and can’t hold much food. So, when it comes to our house cats, splitting their daily calorie allowance into two or three meals throughout the day is going to feel much better on their bellies than if you were to only offer one bigger meal.

tabby cat eating on metal bowl
Image Credit: Krakenimages.com, Shutterstock

4. Their Stomachs Are Highly Acidic

A cat’s stomach is a very acidic environment; it has to be in order to properly digest their food. Cats are obligate carnivores and are often consuming large amounts of meat, as well as the occasional small bone or feather for feral cats. In fact, stomachs with too low of acidity can cause numerous health issues, such as acid reflux, indigestion, and regurgitation.

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


5. Cats Get Hungry Again 8–10 Hours After Eating

Cat stomachs have a simple structure. Once the stomach fills with food, it then empties within a few hours and moves on to the small intestine. About 8–10 hours after eating, the stomach starts to send signals to the brain letting it know it’s time to eat again. However, if cats go too long without eating (about 12 hours), it can cause the stomach to fill with gastric acid and even lead to vomiting. This is another reason why feeding cats several small meals throughout the day is ideal.

cat not eating and looking at the food in the bowl
Image Credit: PawelKacperek, Shutterstock

6. Digestion Takes Anywhere From 10–24 Hours

The stomach is a crucial part of the digestive system, but because cats are so small, it only takes about 10–24 hours for food to be completely digested compared to a human’s 2–5 days. To reiterate from the last fact, food only stays in a cat’s stomach for a few hours before moving on to the small intestine.

Hepper NomNom - Spill Proof Elevated Cat Bowl
  • NO MESS - The 360° tray on this cat food and water bowl set has a raised design to catch and...
  • WHISKER FRIENDLY - Shallow and wide metal containers with flat bottoms ensure your kitty can enjoy...
  • CHEW-SAFE MATERIALS - Kittens and cats love chewing on silicone and soft rubber - but it's a choking...

Learning about what your cat can and cannot eat is a crucial part of keeping them happy and healthy! Choosing a bowl to serve cat-friendly foods in is another important decision pet owners face. Satisfy the specific needs of your cat with the innovative design of the Hepper NomNom Cat Bowl. Learn why it’s our (and our cats!) favorite food and water dish here.

At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!


7. People Sometimes Mistake the Primordial Pouch for a Second Stomach

When you watch your cat walk or run, you might notice that they have a low-hanging part of the belly that sways back and forth. While some people have mistaken this for a second stomach, it’s actually the primordial pouch.

Having a primordial pouch does not mean your cat is overweight, even if it sometimes looks like it (and some cats are, in fact, overweight). Instead, it is made up of fur, skin, and fat, and it’s thought that cats have this for a few reasons: an added layer of protection of the vital organs during a fight, for extra flexibility as they run, and an extra place to store energy as fat reserves.

Maine coon cat lying on the wooden floor and primordial pouch is visible
Image Credit: Pickless, Shutterstock

divider 2 cats

Conclusion

A cat’s stomach is designed and adapted to suit the diet and lifestyle of a cat. It plays an important part in digestion and the movement of food to the intestines where the nutrients can be absorbed. While you might not think about this small organ much, learning some of the unique facts about the stomach can help you to better understand your cat and how their body functions.


Featured Image Credit: Zhuravlev Andrey, 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

2 Responses

  1. I am a previous vet tech and a retired BSN in nursing. This article is one of the best and most jnformative I have read.

    1. Hello Kathi,

      thank you very much for your kind words. We always strive to provide our readers with the most helpful and correct information so they could make lives of their cats better.

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

What Shots Do Kittens Need? Vet-Reviewed Schedule, Facts & FAQ

Kittens need several vaccinations to protect them from infectious diseases. All kittens are susceptible to these diseases, no matter what their breed is....

Why Is My Cat Standing on His Hind Legs? Possible Reasons & When To Be Concerned (Vet-Verified)

It’s not uncommon for cat owners to catch their cats doing crazy things, like chasing their tails or staring wide-eyed into the distance....

Maine Coon Kittens for Sale in Michigan: Breeders List 2026

Catster advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it to...

Fancy Feast Cat Food Review in 2026: Recalls, Pros & Cons

Review Summary If you’ve been researching cat foods, you’ve probably seen the name Fancy Feast. This well-known brand has been around since 1982...

More related

Ask Dr. Paola – Blind Cats, Clogged Nostrils & Sunshine Spasms (February 10, 2025)

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

What Kind of Cat Breed Is Thomas O’Malley? Movie Cats Explained

If you’ve seen Disney’s 1970s film, The Aristocats, you are probably aware that Duchess is a Turkish Angora. But have you ever wondered...

We Talk Commercial Art and Kitty History with the Two Authors of “Cat Food for Thought”

Cats were our childhood obsession, and the name “Meow Mix” alone was so thrilling we couldn’t believe it was real. The TV commercial...

Toronto Humane Society Celebrates Success of Taylor Swift-Inspired Cat Adoption Campaign

The Toronto Humane Society should be celebrating like they’ll never go out of style after a successful Taylor Swift-inspired cat adoption campaign. Launched...

Keep reading

Why Does An Adult Cat Go Limp When You Grab Their Scruff? Vet-Verified Reasons & FAQ

When mother cats want to move their kittens, they gently bite the skin on their necks to lift them. The kittens almost always react the same way: They go completely limp. There’s even a scientific name for this inert, lifeless...

Owner grabbing a cat by the Scruff

Will My Cat Have a Period After Being Spayed? 4 Signs Your Cat is in Heat

Not every cat owner has experienced a cat in heat. Many choose to get their cats spayed as soon as they’re old enough, thus stopping the reproductive cycle for the rest of their lives. So, when your cat somehow has...

cat wearing plastic cone collar

Can Cats Eat Gummy Bears? Vet-Reviewed Nutritional Facts

Gummy bears are fun treats when you want to wind down after a long day. They’re chewy, sugary, and adorably tasty. If your cat is the sort to always demand a nibble of whatever you’re eating, you may have considered...

Can Cats Eat Gummy Bears

Can Cats Eat Oats? Vet-Verified Nutritional Facts & FAQ

Oats are commonly praised as nutritious for us to have for breakfast. Full of fiber, oatmeal fills us up and starts the day off right. It’s beneficial for us, but can cats have oats? Cats can eat oats, but it’s...

Can Cats Eat Oats

Can Cats Eat Just Wet Food? Vet-Reviewed Facts & FAQ

Cats are curious creatures known for their unique personalities, occasional mischievous behavior, and dietary needs. As such, there is a lot of debate about what types of foods are best for cats. One of the most pressing questions is whether...

Can Cats Eat Just Wet Food

Is the Buttercup Toxic to Cats? Vet-Approved Facts & FAQ

The buttercup plant (Ranunculus acris), also known as butter cress or figwort, is a member of the Ranunculaceae family (that’s a mouthful!). It’s a common yellow plant in the US. If you grew up near them, you might have used...

Catster_Is the Buttercup Toxic to Cats

Are Himalayan Salt Lamps Safe for Cats? Vet Reviewed Facts

Himalayan salt lamps have become increasingly popular over the last few years. Their pink light creates a serene atmosphere and is excellent for “mood” lighting. Other benefits are advertised as well, including cleaner air, mood improvement, and better sleep. Himalayan...

Catster_Are Himalayan Salt Safe for Cats

Why Is My Cat Throwing Up White Foam? 8 Vet-Reviewed Reasons

Cats vomit for several reasons. As unpleasant as it sounds, the color and consistency of your cat’s vomit may give you and your veterinarian a clue as to the reasons why. What if your cat is throwing up white foam?...

cat-vomitting

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.