6 entries in the allium category — sorted by risk.
Content compiled with reference to guidance from the Blue Cross, PDSA, Royal Veterinary College (RVC), Battersea, and Animal PoisonLine. This site does not provide veterinary advice — always consult a vet. Last reviewed: 27 September 2026.
Onions, garlic, leeks, chives and shallots — all members of the Allium family — are the most common food-toxicity emergency for UK cats. They destroy red blood cells through a mechanism cats can't defend against. Fresh, cooked, dried, or powdered all count.
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