A tiny bit of plain spinach is not toxic to most cats, but spinach is high in oxalates, which can contribute to urinary crystals and stones. Cats with any history of urinary or kidney problems should avoid it, and healthy cats should get only a rare, small taste.
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Caution — oxalates a concern, especially for urinary catsAmount, form, or frequency matters
Can cats eat spinach? 🥬
A tiny bit of plain spinach is not toxic to most cats, but spinach is high in oxalates, which can contribute to urinary crystals and stones. Cats with any history of urinary or kidney problems should avoid it, and healthy cats should get only a rare, small taste.
Source-linked record · Last reviewed July 17, 2026 · Not veterinary advice
Why this answer
Spinach contains calcium oxalate, and the oxalates can encourage the formation of urinary crystals and bladder or kidney stones in susceptible cats, which is why it warrants caution rather than a green light. It is otherwise non-toxic, but an obligate carnivore has no need for leafy greens, so the risk is not worth taking often.
Watch for
Straining or frequent urination if crystals develop
Blood in the urine in a cat prone to stones
Mild stomach upset after a large serving
How much is okay
At most a small pinch of cooked plain spinach, rarely — and none at all for a cat with urinary or kidney history.
Serve it safely
Skip spinach entirely for any cat with a urinary or kidney condition.
For a healthy cat, offer only a tiny amount of plain cooked spinach, no seasoning.
Never serve spinach cooked with onion, garlic, butter, or cream.
Sources and evidence notes (3)
Poisons
Cornell Feline Health Center, Cornell University College of Veterinary Medicine — Feline-specific poisoning overview covering common household toxin exposures in cats, clinical signs, and the need for prompt veterinary care.
Feeding Your Cat
Cornell Feline Health Center, Cornell University College of Veterinary Medicine — Feline nutrition fundamentals: cats are obligate carnivores; complete balanced cat food should be the diet base; treats should stay a small share of daily calories.
Poison List
Pet Poison Helpline — Veterinarian-maintained toxin database for dogs and cats, reachable at (855) 764-7661, with per-substance toxicity levels, signs, and species notes.
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Go to an emergency vet immediately if
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Effective: July 17, 2026
Can Cats Eat It? provides general educational information for cat owners. It is not veterinary, diagnostic, treatment, or emergency advice.
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