Is Castor Bean Toxic to Dogs?
Also known as: Castor Oil Plant, Palma Christi · Ricinus communis
What makes it toxic
Ricin, a lectin toxin concentrated inside the attractive mottled seeds. Chewing releases it, and it inactivates cellular ribosomes, causing severe organ damage.
Warning signs to watch for
Signs typically begin hours to two days after ingestion: vomiting, often bloody diarrhea, abdominal pain, drooling, dehydration, tremors, seizures and collapse.
What to do if your dog eats it
This is an immediate emergency. Get the dog to an emergency vet now with any recovered seeds, and let the vet decide on decontamination and intensive support.
Common questions
My dog swallowed a castor bean whole without chewing — is that better?
An intact swallowed seed may pass, but you cannot rely on that. Get an emergency evaluation; vomiting can be induced safely at the clinic.
Why grow castor beans at all if they are this dangerous?
They are popular ornamentals, which is why poisonings still happen. If you keep them, remove seed pods before they mature and supervise dogs closely.
More plants checked for dogs
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.