Research-Backed Benefits

Why fresh cat grass actually matters

We read the research so you don't have to. Here's what vets and credible sources say about cat grass, and why indoor, pesticide-free is the safer choice.

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7 sources cited
Last reviewed:
The Quick Version

6 things the research tells us

If you only read one section, make it this one.

Totally normal behavior

65% of cats eat plants weekly. 94% looked healthy before eating. It's instinct, not illness.

Helps with hairballs

Fiber can help move swallowed fur through the gut, or occasionally trigger a one-off purge.

Instinct meets enrichment

A safe, cat-friendly grass option can satisfy chewing urges and reduce interest in toxic houseplants.

Gentle nutrient nudge

Fresh cereal grasses contain micronutrients and roughage. Think of it as a small, natural add-on.

Safe when chosen wisely

Wheat, oat, barley, rye are commonly considered cat-safe. Avoid treated lawns and unknown plants.

When to see a vet

If eating becomes compulsive or vomiting becomes frequent, it's time for a checkup.

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What the research actually says

We curated findings from peer-reviewed journals, veterinary institutions, and reputable pet health organizations. Sources are tiered by scientific rigor.

Academic Research Veterinary Networks Educational

We prioritize studies published in indexed journals, then licensed veterinary sources, then reputable pet organizations. Marketing content is noted.

65%
of cats eat plants weekly
94%
looked healthy before eating
7
sources reviewed
Academic Research Peer-reviewed journals and university studies
Journal of Veterinary Behavior
Peer-reviewed journal
2025

Plant eating behavior in domestic cats: support for the hair evacuation hypothesis

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Using electron microscopy and DNA analysis, researchers found grass blades and rough plant fragments intertwined with hairs in feline hairballs. No parasite remnants were seen. This suggests a mechanical function: cats eat coarse grass to bind and expel fur.
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Veterinary Networks Vet hospitals and clinical practices
VCA Animal Hospitals
Vet hospital network
2024

Where the Green Grass Grows: Grass Treats for Cats

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A practical veterinary overview noting that cats on balanced diets "lack nothing," yet grass still benefits well-fed cats by providing roughage for digestion. Cats who routinely eat grass have fewer hairballs and less constipation.
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Pete the Vet
Veterinary practice
2024

The Many Wholesome Benefits of Cat Grass

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Veterinarian Pete Wedderburn notes that cat grass (from wheat, oat, rye or barley) is non-toxic and provides enrichment. Benefits include hairball support, mental stimulation, and diverting cats from toxic houseplants.
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Educational Vet-reviewed media and pet health organizations
PetMD
Vet-reviewed media
2023

Why Cats Eat Grass

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Discusses common hypotheses: hairball purge, fiber for stool motility, and instinctual plant-eating. Suggests offering safe grasses indoors for cats without outdoor access.
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Blue Cross
Pet welfare charity
2022

Why do cats eat grass?

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Explains grass-eating as common and often safe, with theories around fiber, folic acid, and hairball passage. Recommends growing an indoor grass pot for enrichment.
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Hill's Pet Nutrition
Pet food brand
2023

Cat Grass: Is it Safe for My Cat?

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Covers common indoor cereal grasses (wheat, barley, oat, rye), mentions fiber and folate content, and recommends monitoring for overconsumption.
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Cats.com
Pet media
2023

Why Do Cats Eat Grass? Should You Worry?

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Overview of common grasses used for "cat grass" (wheatgrass, oat, rye, barley) and tips for safe indoor access as an alternative to houseplants.
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