Is Crown Vetch Toxic to Cats?
Also known as: Axseed, Hive Vine, Securigera varia · Securigera varia (syn. Coronilla varia)
What makes it toxic
Nitrotoxins, chiefly 3-nitropropionic acid and its glycosides, which disrupt cellular energy metabolism and attack the nervous system. Seeds are the most concentrated part, but foliage and flowers are also hazardous.
Warning signs to watch for
Weakness, rapid breathing, staggering and tremors within hours to a day of eating the plant, progressing to seizures, paralysis and death in severe cases.
What to do if your cat eats it
Treat ingestion as an emergency. Go to a vet promptly even if signs seem mild — there is no antidote, so early decontamination and supportive care are the main protection.
Common questions
Is crown vetch the same plant used on roadsides?
Yes — it is widely planted for erosion control on highway slopes and banks. A cat exploring a roadside verge can easily meet the pink-pea-shaped flowers.
Is one nibble dangerous?
A single nibble of leaf is more likely to cause drooling than paralysis, but the dose-response is unpredictable and no antidote exists, so owners are advised to err on the side of a vet call.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.