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Why Do Cats Eat Grass? Unveiling the Feline Feast on Greens

British Shorthair cat eating grass outdoors

Cats are mysterious creatures, known for their aloof behavior and curious antics. One such behavior that often leaves cat owners puzzled is their tendency to munch on grass. If you’ve ever witnessed your feline friend nibbling on blades of green, you might wonder why they do it.

Is it a sign of illness, a dietary deficiency, or just a strange feline fascination? In this article, we will delve into the intriguing world of cats and their penchant for eating grass, uncovering the reasons behind this seemingly peculiar behavior. Let’s see why do cats eat grass.

Reasons Why Cats Eat Grass

1. Natural Instinct

Cats are natural hunters, and in the wild, their prey often contains plant matter, such as the stomach contents of small animals. This plant material can include grasses and other vegetation. Eating grass may be an instinctual behavior that helps domestic cats mimic their wild ancestors’ diet.

2. Aids in Digestion

One of the most widely accepted explanations for why cats eat grass is that it can aid in digestion. Cats lack the necessary enzymes to break down plant cellulose effectively, but the fibers in grass can help move other indigestible material, such as fur and bones, through their digestive system. In essence, grass acts as a natural laxative, helping to prevent hairballs and promoting regular bowel movements.

3. Soothing an Upset Stomach

Cats may eat grass when they have an upset stomach. The rough texture of grass can help induce vomiting, which can expel ingested toxins, fur, or undigested food. This self-induced vomiting may provide relief to a cat experiencing digestive discomfort.

4. Nutritional Supplements

Some experts believe that cats might consume grass to supplement their diet with certain nutrients or trace elements that they may lack from their regular cat food. Grass can provide vitamins, minerals, and antioxidants, which could be beneficial in small amounts.

5. Behavioral Stimulation

Eating grass can also serve as a form of behavioral stimulation for cats. Chewing on grass can be an enjoyable and mentally engaging activity, especially for indoor cats that may not have access to a natural outdoor environment.

6. Taste and Texture

Cats are known for their finicky tastes, and some simply enjoy the taste and texture of grass. The act of chewing on grass can be pleasurable for them, much like how humans might snack on crunchy foods.

7. A Gentle Purgative

Cats have an innate ability to self-regulate their diet. When they feel the need to cleanse their digestive system or relieve minor gastrointestinal issues, they may seek out grass as a gentle purgative.

Should You Worry About Your Cat Eating Grass?

In general, occasional grass consumption is not a cause for concern and may even be beneficial for your cat. However, there are some important considerations to keep in mind:

Ensure the grass is safe

Make sure the grass your cat has access to is free from pesticides, herbicides, and other chemicals that could harm them. Providing cat-friendly grass varieties or using pet-safe indoor plants can be a safer alternative.

Monitor your cat

If your cat eats a large amount of grass and then exhibits unusual behavior, vomiting excessively, or seems distressed, consult your veterinarian. There could be an underlying health issue that needs attention.

Offer a balanced diet

Ensure your cat receives a well-balanced and nutritionally complete diet from commercial cat food. This will help meet their dietary requirements and reduce the need for seeking additional nutrients from grass.

The Debate Continues: Is Cat Grass Necessary?

While the reasons behind cats eating grass are becoming clearer, the debate over whether providing cat grass is necessary or beneficial persists. Let’s delve deeper into this discussion:

1. Cat Grass Varieties

Cat grass, also known as “catgrass,” “cat wheatgrass,” or “cat oat grass,” is a type of grass specifically cultivated for feline consumption. It’s typically available in pet stores and comes in various forms, including seeds and pre-grown pots.

2. Safe and Nutrient-Rich

Cat grass varieties are chosen for their safety and nutritional content. These grasses are free from harmful chemicals, making them a safe option for your cat to munch on. The grasses also contain essential vitamins and minerals, which can contribute to your cat’s overall health.

3. Providing an Indoor Outlet

For indoor cats, access to the outdoors and natural grass is limited. Cat grass can serve as an indoor alternative, offering a safe and controlled way for cats to satisfy their grass-eating instincts and derive potential digestive benefits.

Cute cat trying to eat grass from the pot

Cute cat trying to eat grass from the pot, image source: Unsplash

4. Reducing Houseplant Damage

Some cat owners provide cat grass as a way to deter their pets from chewing on houseplants, which may be toxic. By offering cat grass, you can redirect your cat’s chewing behavior to a safe and beneficial option.

5. Mental Stimulation

Introducing cat grass can provide mental stimulation and enrichment for indoor cats. It gives them an opportunity to engage in natural behaviors like hunting (pouncing on the grass) and foraging (searching for grass blades).

6. Monitoring Consumption

Cat grass can help you monitor your cat’s grass consumption more easily. Instead of allowing your cat to chew on potentially unknown or harmful outdoor grass, you can offer a controlled and monitored source.

7. Practical Considerations

Cat grass is relatively low-maintenance and easy to grow indoors. It requires minimal attention and can provide an ongoing source of entertainment and enrichment for your cat.

Cat grass can be useful especially for indoor cats

Cat grass can be useful especially for indoor cats, image source: Unsplash

Cautions and considerations when using cat grass

While cat grass can offer benefits, it’s essential to consider a few cautions:


Just like with any treat or supplement, cat grass should be offered in moderation. Excessive consumption may lead to vomiting, which, while generally harmless, should be monitored.


Ensure the cat grass you provide is safe and free from pesticides or chemicals. It should be specifically designated as “cat grass” or “pet grass.”


Cats may have preferences for certain grass varieties, so you may need to try different types to see which one your cat prefers.

Professional Advice

If your cat has a specific health condition or dietary needs, consult your veterinarian before introducing cat grass or any dietary changes.


In conclusion, the act of cats eating grass is a multi-faceted behavior that encompasses instinct, digestive benefits, potential nutritional supplementation, and simple enjoyment. While occasional grass consumption is generally considered harmless and even beneficial, it’s crucial to provide safe grass options and monitor your cat’s behavior for any signs of distress.

Understanding and accommodating your cat’s occasional hankering for greens can contribute to their overall well-being and contentment.

Article written by:

Darius Savin is a lifelong animal lover and protector and the chief editor of Checkmember. He writes and edits articles and is also the creator of the distribution maps for all the creatures featured here.