Is Sweet Pea Toxic to Cats?
Also known as: Annual Sweet Pea, Perfumed Pea, Lathyrus odoratus · Lathyrus odoratus
What makes it toxic
Lathyrogenic amino acids, including beta-aminopropionitrile and ODAP, concentrated in seeds and seedlings. They interfere with collagen cross-linking and nerve function; the danger grows with repeated or large ingestion.
Warning signs to watch for
A single nibble may cause drooling, vomiting or diarrhea. Repeated or heavy intake can bring trembling, weakness, a stiff or wobbly gait and, in severe chronic cases, seizures and paralysis.
What to do if your cat eats it
Remove plant material and call your vet for any confirmed chewing, and promptly if seeds or pods were eaten. Weakness, stumbling or tremors mean go to the clinic immediately.
Common questions
Is one bite of sweet pea dangerous?
A taste is unlikely to do lasting harm, but seeds and pods are the most concentrated parts — treat any seed-eating as urgent and watch for tremors.
Is sweet pea the same as edible peas?
No — garden peas (Pisum sativum) are safe food, while Lathyrus sweet peas are toxic ornamentals. The pea-shaped flowers mislead people.
Why does the danger build up over time?
The toxins cause damage cumulatively, which is why grazing on the plant for weeks is worse than a single incident — do not let a cat treat the vine as a snack bar.
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.