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

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

How Long Can a Cat Live With Hypertrophic Cardiomyopathy? (Vet Answer)

One of the most common (and hardest to answer) questions that a vet gets asked when their cat receives a disease diagnosis is,...

History of Russian Blue Cats – Taking a Look at Their Past

The Russian Blue is a gorgeous cat with a silvery blue coat, emerald green eyes, and a winning personality. These beloved felines get...

Ragdoll Munchkin Cat Mix: Info, Pictures, Temperament & More

Once you get a good look at a Ragdoll Munchkin cat mix, you’re sure to fall in love. These striking cats feature the...

Omlet Cardboard Cat Scratching Post Review 2025: A Detailed Look

As a devoted cat owner, I amalways seeking the perfect solution to satisfy my pets’ natural scratching instincts while minimizing damage to furniture...

More related

Cat Spraying vs Peeing: Vet-Verified Differences

Dealing with your cat peeing inappropriately in your home can be exceedingly frustrating. Many cat owners don’t realize there’s a difference between your...

How to Collar Train a Cat: 8 Vet-Approved Steps

When you think of collars, you might automatically think of dogs. But collars can also be useful for cats (and in fact, they...

Why Is My Cat Scratching the Mirror? Possible Causes & Solutions

There are several reasons a cat scratches a mirror. Figuring out the answer largely depends on the context of the behavior. Some cats...

Will a Cat Overeat If They Get Excess Food? Vet-Approved Facts & Feeding Tips

Cat owners who spend time away from their pets often worry about their pets going hungry. To ensure that their pet is never...

Keep reading

Can Cats Eat Garlic? Vet-Reviewed Risks & FAQ

Few foods are as popular and as potent as garlic. We use garlic to imbue its delicious, savory flavor into our foods, and millions love the bulbous, flowering plant. However, if you’re a cat owner, you might wonder if your...

Can Cats Eat Garlic

7 Possible Signs Your Cat May Need a Feline Friend: Vet-Reviewed Introduction Tips & More

If only our pets could talk, we’d have a much easier time understanding their needs. Cats can be even more difficult to decipher than dogs. Their natural aloofness means we have to work twice as hard to figure out if...

cats reflection II_ OlenaPalaguta_Shutterstock

How Do I Tell If My Cat Is Constipated? 8 Vet-Reviewed Signs to Watch For

If you’ve noticed that there hasn’t been poop in the litter box for a few days (and your cat isn’t going somewhere else), it could mean that your cat is constipated. Some signs of constipation are more obvious than others,...

cat pooping on the grass

Can Cats Eat Pumpkin Seeds? Vet-Reviewed Nutrition Facts & FAQ

Yes, most cats can eat pumpkin seeds without suffering any adverse effects. Pumpkin seeds are packed with nutrients that are extremely beneficial. What’s more, some cats seem to love the taste of these seeds. Therefore, do not be afraid to...

Can Cats Eat Pumpkin Seeds

When to Euthanize a Cat? Vet-Reviewed Factors & FAQ

Watching a beloved family pet get old can be hard. As cats age, they will grow weaker and skinnier. Their behavior might change. They might not be the same cat that you used to know when they were younger. In...

a sick siberian cat being carried by owner

7 FIV in Cats Vet-Approved Facts You Might Not Know About

Feline immunodeficiency virus (FIV) is a common and serious infection in cats worldwide. This lentivirus, which weakens the cat’s immune system, is similar to the human immunodeficiency virus (HIV) responsible for AIDS in humans 1. Although cats with FIV may...

woman holding her cat in vet clinic

Iris Melanosis in Cats: Vet-Verified Signs, Causes & Treatment

A cat’s eyes are often their most striking feature. We all know whether our cats have amber or green irises and are fairly familiar with the shape of their eyes and pupils. Iris melanosis in cats is a condition of...

cute orange tabby cat

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 cats that go missing are never found, and they either end up dying on the streets or...

microchipping cat