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

Can Cats Eat Maple Syrup? Vet-Verified Nutrition Facts & Risks

Cats can be unpredictable creatures that aren’t big on abiding by the rules. If your cat wants to investigate something, they will. If...

Can Cats Be Double-Jointed? Our Vet Explains Facts & FAQ

A common phrase associated with cats is, “If I fits, I sits.” They can contort into some of the craziest positions, and you...

How to Dispose of Cat Litter Without Plastic Bags: 6 Vet-Verified Tips & Tricks

As cat parents, we are constantly looking for ways to improve the litter experience in our homes. Litter boxes can be one of...

5 Creative DIY Cat Window Guard and Screen Protector Plans (With Pictures)

Most cats enjoy nothing more than lounging by a window and enjoying the sun. Their favorite spot might worry you because of their...

More related

When Do Kittens’ Eyes Change Color? Vet-Verified Facts & FAQ

You may have recently brought home an adorable new kitten with baby-blue eyes, but did you know that those icy-blue eyes might change...

How Often Should I Brush My Cat? Vet Approved Advice

If you’re a cat parent, you’re familiar with the lovely moments you spend brushing your cat while they purr away contentedly. Or, if...

Siamese Kittens for Sale in Minnesota: 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...

9 Best Cat Beds in Australia in 2025 – Reviews & Top Picks

A cat bed is more than somewhere for your cat to sleep. It is a place of relaxation. Somewhere your feline friend can...

Keep reading

How to Care for a Cat After Surgery: 12 Vet-Approved Tips

The last thing that we want is for our cats to experience any kind of pain or discomfort, but surgery can be a necessary part of caring for them. Whether you’re having your cat spayed or neutered or something else...

cat in vet clinic recovering from spaying procedure

Are There Cat Hemp Treats? Health & Safety FAQ

Cats have their own unique dietary needs, and pet owners are increasingly turning to hemp-based products as a way to supplement their cat’s diet. Hemp treats for cats can provide important health benefits, including improved digestion, increased energy levels, and...

giving orange cat a hemp chew

Cat Splashes Water Out of the Bowl: 5 Vet-Verified Reasons & How to Stop It

While the behavior can be frustrating due to the mess, your cat splashing their water out of their water bowl and all over the floor is normal and usually no reason for concern. Despite having a reputation for being afraid...

a cat dipping its paws on a bowl of water

Why Does My Kitten Want to Play at Night? Vet-Approved Reasons & Tips

When we get a kitten, there are so many “firsts” to experience. Some of them are so cute you could scream, and others can be a little taxing to deal with. If your rambunctious kitten keeps you up at night...

Cute Young gray british Tabby Cat Kitten Lying and jumping Down Playing and Biting Mouse and String Toy

Can Cats Eat Applesauce? Vet-Reviewed Facts & Considerations

Applesauce is considered safe for kids and adults, but is applesauce safe for cats? The short answer is that while it is safe to give applesauce to cats in small amounts, there are many things to consider before you do...

Can Cats Eat Applesauce

What Do Cats Think About All Day? Facts & FAQ

Your cat is sitting in their favorite spot, staring into the distance. They look just like they’re contemplating the mysteries of the universe—but are they? Figuring out what cats think about all day isn’t an easy task. There aren’t very...

ragdoll cat lying on couch

Why Do Cats Act Weird When Scratching the Base of Their Tail? 10 Reasons

It’s not uncommon for cats to act weird when you scratch the base of their tail. This area is quite sensitive and cats respond one way or another. Additionally, a tail that sticks straight upright into the air is referred...

young cat breathing heavily

Why Do Cats Move Their Ears? Vet Reviewed Science & Meanings Explained

Cats are incredibly expressive animals, and while they can’t mimic human words, they have a wide range of ways to convey feelings through their body language. As well as their eyes and tail, cats can portray a lot of emotion...

close up image of cat's ears and eyes