Can cats eat grass?
Quick answer: Not recommended — grass is best avoided for cats.
Quick verdict
Caution
Key risk
Avoid grass treated with chemicals; some ornamental or houseplant grasses can be toxic, so offer purpose-grown cat grass.
Why
Cats often nibble grass, and cat grass is a safer option.
Can cats eat grass, and why?
Cats often nibble grass, and cat grass is a safer option. Avoid grass treated with chemicals; some ornamental or houseplant grasses can be toxic, so offer purpose-grown cat grass.
Cats are obligate carnivores: they must get most of their nutrition from meat and need nutrients such as taurine that only animal products provide. They lack some enzymes for processing plants and carbohydrates, so fruit and veg offer little benefit and can upset their stomach; many cats are also lactose intolerant.
Warning — what to watch for
Avoid grass treated with chemicals; some ornamental or houseplant grasses can be toxic, so offer purpose-grown cat grass.
If your cat has eaten grass, don’t wait for symptoms — contact your vet immediately, or call the Animal PoisonLine on 01202 509000 (24/7, UK). Signs of a problem can include vomiting, diarrhoea, drooling, lethargy, tremors or loss of appetite.
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Frequently asked questions
Can cats eat grass?
Caution. Cats often nibble grass, and cat grass is a safer option.
What happens if my cat eats grass?
Avoid grass treated with chemicals; some ornamental or houseplant grasses can be toxic, so offer purpose-grown cat grass. If your cat has eaten grass, contact your vet or the Animal PoisonLine (01202 509000) straight away — don’t wait for symptoms.
Is grass poisonous to cats?
Caution. Cats often nibble grass, and cat grass is a safer option.
Free printable: safe & toxic foods for cats
grass is just one food — get the full one-page checklist of what’s safe, fine in moderation, or dangerous for cats. Vet-sourced, yours to print and keep.
Check grass for another pet
Sources
Our verdict on whether cats can eat grass draws on established UK and US veterinary and welfare organisations. Individual pets, quantities and preparation vary — always confirm with your own vet.