Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My dog ate Castor Bean - what should I do?
Ricinus communis
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Severe gastrointestinal distress, drooling, loss of appetite, dehydration, and potential organ damage.
Escalation note
The plant contains ricin, which is extremely dangerous to dogs. Immediate veterinary intervention is required if ingestion is suspected.
First aid at home
Get your dog to a veterinarian immediately. Bring a sample of the plant or any remaining seeds for identification. Do not try to induce vomiting at home unless poison control or your vet specifically tells you to — Pet Poison Helpline notes that decontamination with activated charcoal and IV fluids is most effective when done at the clinic.
What to watch for
Severe and fast-onset signs: heavy drooling, oral irritation, vomiting (sometimes bloody), diarrhea, abdominal pain, and excessive thirst. As ricin spreads, watch for loss of appetite, weakness, trembling, dehydration, sweating, and labored breathing — Pet Poison Helpline notes seeds are the highest-risk part.
Time window
ASPCA reports onset is typically 12–48 hours after ingestion, though oral irritation and vomiting can begin within hours of chewing seeds. Without aggressive in-clinic treatment, severe cases can progress to organ failure and death over 1–3 days.
When to call the vet
Call immediately — this is a true emergency. Phone ASPCA Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661) on the way to the clinic, even if your dog seems fine. Symptoms can be delayed by 12–48 hours and waiting can be fatal.
What this means for your dog
Castor bean is one of the most dangerous garden plants for dogs. ASPCA and Pet Poison Helpline both flag it as severely toxic — chewing as few as one or two seeds can be life-threatening because the seeds contain ricin, which inhibits cellular protein synthesis and can cause organ failure.
Sources: ASPCA, Pet Poison Helpline.
Source references
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.