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 Cats Eat Grass? 5 Vet-Reviewed Reasons Behind the Behavior

close up of a cat eating grass

Our beloved cats are quirky creatures with some habits that seem rather baffling to cat owners. One of these behaviors is cats chowing down on grass and then sometimes throwing it back up. Why? Why on earth do these intelligent and sensitive mammals eat grass only to throw it up again? Well, rest assured, we will answer this question and explore the reasons behind this peculiar cat behavior.

However, before we launch into the whys, we would like to start by reassuring you that eating grass is not harmful and is thought to possibly be beneficial for your cat, and many cats enjoy it. However, make sure your grass is not treated with any chemicals, and remove all toxic plants from your home.

Let’s dig deeper into some of the possible causes why cats like eating grass, while also demystifying previously believed reasons for this particular habit.

divider single cat paw oct 2024

The 5 Possible Reasons Cats Eat Grass

1. Instinct Sometimes Accompanied By Throwing Up

Cats are classified as obligate carnivores, which means they need to eat meat to survive. In fact, they don’t have the right digestive enzymes to metabolize vegetation, so adding vegetables to a cat’s diet isn’t doing them any favors.

Because of their inability to digest the grass, some cats may throw up, which will also expel any indigestible material – bones, feathers, hairballs, all of which might make your cat feel ill.

Today, we know that only a quarter of cats actually end up vomiting after eating grass, and the majority of cats do not seem sick in any way before ingesting grass.1 Eating grass is an instinctual behavior that most cats like to partake in.

cat on grass field
Image By: Michael Berger, Pixabay

2. The Purge

Scientists now also believe that this instinct may come with an added evolutionary benefit. Your cat might also seek out grass to intentionally dispel excess fur or even parasites, such as worms, through their other end. Grass might add extra bulk and fiber to their diet, which can act as a natural laxative and could potentially help your cat get rid of unwanted visitors.

Fiber from the grass can be beneficial to your cat’s digestive system and help in managing furballs in some cases.


3. Added Vitamins

Grass contains folic acid (vitamin B9) when it’s broken down (essentially, chewing grass releases the folic acid in the “grass juice”). It’s essential for keeping red blood cells healthy, and if there isn’t enough folic acid in the body, anemia could occur.

Some cats really seem to like the taste of grass, and this may be due to folic acid, but we cannot know for sure. If you suspect that your cat may be lacking in folic acid or other vitamins and minerals, speak to your vet before attempting to treat the condition at home, as too much of any beneficial or essential ingredient can be harmful for their health.

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


4. It’s a Matter of Taste

In some cases, it could just be that your cat is enjoying the feel and taste of the grass in their mouth. They may like the texture, and some cats will nibble at grass and other plant material from boredom and curiosity.


5. Health Reasons

If your cat regularly eats grass in excess or other non-food items, they might be showing signs of underlying health issues, anxiety, or stress. Some cats exhibit signs of stress by over-grooming or excessive meowing, or they turn to chew on inappropriate and less-edible items as a way of self-soothing. If you have a cat that is indoors-only, be sure your houseplants are not toxic or they are placed in areas that your cat cannot access, as they might try to chew on your plants.

If your cat only eats grass once in a while and they have been doing it for years in moderation, it typically isn’t anything to worry about. However, if it seems to be a frequent occurrence (several times a day or multiple days a week), or it’s accompanied with any signs of stress or ill health, such as reduced appetite, vomiting, diarrhea, weight loss, or other, be sure to take them to your vet to help rule out any health issues. You can also work with your vet to help your cat if you believe they have stress or anxiety problems.

divider cat paw scratch oct 2024

Cause for Concern

As you can observe from this list of reasons why your cat may be eating grass, it isn’t typically something to be overly concerned about. Having said that, it is recommended that growing your own cat grass is safer as it’s organic and won’t contain any herbicides or pesticides. And of course, there’s always the entertaining catnip.

If your cat eats grass that you know has been chemically treated, or if you aren’t sure, consult with your vet straight away rather than wait for signs of toxicity, oral irritation, or digestive upset to occur.

divider cats oct 2024

Conclusion

So, we’ve gone over the most common possibilities of why your cat might be eating grass. They are probably just enjoying the taste and texture, exhibiting their natural instinctive behavior, all while supporting the digestive system or purging themselves of indigestible items. They might be looking to add folic acid to their diet, or if they are eating grass excessively, it may be a sign of underlying health issues or stress.

Since experts can’t actually ask cats why they do these behaviors, we will never truly know or understand why they occur. However, if you are concerned about your cat’s physical or mental health, take them to your vet. Overall, grass-eating in moderation isn’t anything to be worried about, but as long as you keep an eye on your cat, their appetite, and their behavior and consider growing some cat grass, your beloved pet should be just fine.

You might also like:


Featured Image: mowli, 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.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Bramble Cat Breed: Info, Pictures, Care & More

No primary feline registry recognizes the Bramble Cat, making it unique among pets. It’s not unusual, nor is it a mark against the...

10 Best Furniture Guards & Cat-Proof Couch Covers in 2025 – Reviews & Top Picks

We love our cats, but sometimes, they can have habits that can cost us. In particular, new kittens and cats may make a...

How to Socialize Your Kitten: 6 Vet-Approved Methods

It’s always exciting to bring home a new kitten. Not only are they incredibly cute, kittens are also full of personality and charm....

Is It True That All Cats Chirp? 5 Reasons Why They Do It

Cats use various vocalizations to communicate with us, and one of these vocalizations is the cute chirping sound you become accustomed to hearing...

More related

How Long Does Cat Dander Stay on Clothes? Facts & Tips to Reduce It

Cat dander can be a problem for cat lovers who suffer from allergies, especially if your cat enjoys being curled on your lap...

Traveling With Kittens: 9 Vet-Approved Tips

Getting ready to hit the road with kittens in tow requires planning, but traveling safely, happily, and comfortably with baby cats is possible....

Ragdoll Kittens for Sale in Illinois: Breeders List 2025

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

Is Pine-Sol Safe for Cats? Vet-Reviewed Health Facts

Most cat owners are aware of the harmful effects that pine oil can have on cats and avoid using products that contain it....

Keep reading

Can Cats Eat Melatonin? Vet Recommendations & Facts

If you regularly have insomnia, chances are you’re familiar with the supplement melatonin. Melatonin is widely used for insomnia because it’s effective (and necessary) for regulating one’s sleep cycle. As a cat parent, you may have wondered if your cat...

Can Cats Eat Melatonin

Can Cats Eat Pansies? Vet-Reviewed Facts & FAQ

Pansies are a staple for anyone who appreciates a splash of color in their garden. These colorful, diverse, easy-to-grow plants are certainly popular with those who love gardening, but what if your cat also develops a liking for them or...

Can Cats Eat Pansies

8 Best Cat Foods for Picky Cats in the UK in 2025: Reviews & Top Picks

Cats generally know what they do and don’t want, and not much can change their minds. This can pertain to where they want to sleep, who they want to cuddle with, and what they want to do during their day....

siamese kitten eating from a stainless bowl

Why Is My Cat Stalking Me? Vet-Approved Behavior Explanation

Cats stalk their prey, stalk their toys, and sometimes even stalk their food. However, what concerns many cat owners is when their cats decide to stalk them. You’re probably familiar with the behavior of a cat stalking and pouncing. They...

woman sitting beside her cat

Special Kitty Cat Food Review of 2025: Recalls, Pros & Cons

Special Kitty Cat Food Review Summary Walmart is known for many things. It sells affordable products that allow regular people to make ends meet, but it’s not exactly known for having the highest-quality offerings. That also sums up its store-brand...

Solid Gold Cat Food Review

How to Calm a Scared Kitten: 7 Vet-Reviewed Methods

Bringing home a new cat is a magical time for you, but have you ever stopped to think about how it might appear to your kitten? After all, they’ve just been carried into a strange new environment by an unknown...

scared kitten hiding

Canidae Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Canidae truly started as a labor of love. The company’s two founders, Scott Whipple and John Gordon, met in a pet food store owned by Whipple. The two men bonded over their love of animals and their dissatisfaction...

Canidae Cat Food Review

Do Cats Like the Scent of Lemon? Vet Reviewed Facts

Cats are known for their curious nature and love of exploring new things. But get them around citrus fruits like lemon, and you may be surprised by their reaction. Cats do not like the scent of lemon, and the smell...

fresh lemons in the bowl and on the wooden table