3628 Lynoak Dr. #107, Claremont, CA



Dr. Ken Tudor
Holistic Veterinarian

Castor Beans are toxic to dogs

Castor Bean Poisoning in Dogs: Right Here in Your Own Backyard

June 27, 2016

Dear veterinary clients of mine shared a story of how an acquaintance of theirs lost both of her dogs to castor bean poisoning here in the Inland Empire. Every dog owner is sensitive to poinsettias, mistletoe, yesterday, today and tomorrow and lily toxic plants but few know that here in our home area is a plant far more toxic- the castor bean plant. The toxin in the fruit bean of this plant is the most toxic chemical known to man, ricin,-the very toxin dust mailed to our last two presidents and other members of congress by radicals on both sides of the political spectrum.

The Castor Bean Plant

As you can see by the picture, the castor bean is a lovely plant that has become a staple of landscaping in southern California homes. It has also become a very common plant in our wilderness and hiking areas. Originally it was cultivated to produce Castor Oil, a potent constipation remedy. The pods of this beautiful plant emit an odor that is very attractive to animals, especially dogs. The pods contain a bean that the animals readily eat. Only 8 beans are lethal to a medium sized dog.

Symptoms and Treatment of Castor Bean Toxicity

Symptoms of mild exposure are generally loss of appetite, excessive thirst, vomiting and diarrhea 12-48 hours after eating the beans. Trembling, loss of coordination, seizures, coma and death can follow for dogs eating the toxic quantity of beans.

There is no antidote for ricin and supportive care with intravenous fluids is the only option for dogs ingesting sub-lethal doses of the beans.


Castor bean plants are a staple plant in our SoCal landscaping, wilderness and recreational trails. Make sure your pet is leashed on all excursions to avoid ingestion of castor beans or other toxic or unsafe materials.

Ken Tudor DVM
Dr. Ken Tudor, Holistic Veterinarian

Dr. Ken Tudor is a recognized expert and leader in the field of pet nutrition and fitness. He has developed a pet weight management program and served on the American Animal Hospital Association task force to develop their Weight Management Guidelines for Dogs and Cats. He is also a frequent guest on the Pet World Insider radio show and a popular guest on the televised Pet Ex Talks-Pet Experts Empowering Pet Parents show.

Castor Bean Poisoning in Dogs: Right Here in Your Own Backyard

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