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)

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

How Much Does It Cost to Microchip a Cat? (2025 Update)

Few things in this world can make you feel as scared and helpless as realizing that your cat has gotten lost. Sadly, many...

Can Cats Eat Pringles? Vet-Reviewed Facts & FAQ

Does your cat come running every time you pop open a can of Pringles because he loves the funny-shaped potato chips? If you’re...

A Stray Becomes the Purrfect Therapy Cat: The Heartwarming Story

Jason and Lori Griggs kept striking out in their search for a therapy cat for their daughter, Kiley, because frightened kitties would run...

How to Tell If Your Cat Loves You: 12 Vet-Reviewed Signs to Look For

Cats have an unfair reputation as aloof independent creatures that don’t need us humans—unless they’re hungry. While some cats can be self-contained, others...

More related

My Cat Ate Dog Dewormer! Here’s What to Do (Vet Answer)

Thankfully, dog dewormers are not inherently toxic to cats. However, the potential issue is whether a cat has eaten too much of the...

200+ Food Related Cat Names: Ideas for Sweet & Adorable Cats

There are several factors to consider before bringing home a new kitten. You are certainly considering how much space, time, and resources you...

4 Best Foods for Cats With Feline Leukemia in 2025 – Reviews & Top Picks

Feline leukemia is an infectious virus that affects your cat’s immune system and is transmitted to other cats through their saliva, feces, or...

Can Cats Be Ticklish? Vet-Verified Science & Info

Cats as pets have generally been unpredictable. They move around the house on their own will, they find ways to reach hard-to-reach places...

Keep reading

9 Best Cat Litters for Odor Control in Canada in 2025: Reviews & Top Picks

One of the biggest perks of owning a cat is not having to take them outside to go to the bathroom. But even the best litter boxes can have issues. While regular cleaning is the best way to prevent smells,...

black and white cat stepping in the litter box

Store Bought vs Homemade Cat Food: Vet-Reviewed Pros, Cons & FAQ

Even though hundreds of store-bought cat food options are on the market, many owners want to make homemade cat food for their cats. Whether it’s because it feels more personal or they believe it’s healthier, it’s not uncommon to want...

Store Bought vs Homemade Cat Food

Can Neutering Your Cat Increase Their Life Expectancy? Vet-Reviewed Facts

Neutering your cat is one of the most important procedures in your male cat’s life.1 Every cat owner knows how bad male cat urine smells, and unneutered males tend to spray once they enter puberty. Aggressive behavior ensues; your male...

cat wearing elizabethan collar after neuter surgery

Do Cats Like To Play Hide And Seek? 9 Vet-Verified Tips On Playing With Your Cat

Cats are playful animals, especially kittens, and enjoy playing different games that mimic hunting behavior. In fact, many owners notice that their cats frequently run off and hide behind things, which can make you wonder if they like playing hide...

bengal cat hiding in a drawer

Why Does My Cat Chew on My Fingers? 8 Vet-Verified Reasons

Cats do weird things sometimes, and if your cat has ever tried to chew on your fingers, you might be wondering what on earth has gotten into them. Some cats might choose to chew plastic; for others, their owners’ fingers...

Gray Cat bitting hand

How to Tell if a Cat Is Spayed: 4 Vet-Reviewed Signs to Look

It’s sometimes hard for new cat owners to know whether their new female feline is spayed or not. For those uninitiated into the wonders of cat ownership, spaying refers to a surgery in which your female cat’s interior sex organs...

sick cat wearing cone inside the clinic

Why Won’t My Senior Cat Eat? 6 Vet-Reviewed Ways to Help

If your cat reaches their golden years, their appetite can decrease. This can happen for a few reasons, but cats will need intervention and care from their owners to feel well again. If your old cat is not eating their...

old-ginger-house-cat-is-resting-on-the-couch_shymar27_shutterstock

Treating Ear Mites in Cats: Vet-Approved Tips & Tricks

Cats have incredible ears! Their hearing range is over 10 octaves, more than dogs or humans, and they have 32 muscles in each ear to help them pinpoint sounds exactly. But that doesn’t make them immune to parasites. If your...

white orange cat with ear mites