Is Rhubarb Poisonous to Dogs?
Rheum rhabarbarum · Polygonaceae
Moderately ToxicAlso toxic to cats
Rhubarb is toxic to dogs.
Why it's toxic
The toxic compounds in rhubarb:
- Soluble calcium oxalates
- Oxalic acid
Symptoms to watch for
If your dog ate rhubarb, watch for:
- Kidney failure
- Tremors
- Salivation (drooling)
- Vomiting
- Weakness/trembling
- Decreased blood calcium (hypocalcemia)
- Kidney injury
What to do if your dog ate it
- 1Remove your dog's access to the rhubarb and check how much may have been eaten.
- 2Do NOT induce vomiting unless a veterinarian or poison-control expert specifically tells you to.
- 3Call your veterinarian, the ASPCA Animal Poison Control Center (888) 426-4435, or the Pet Poison Helpline (855) 764-7661 right away.
- 4Note the amount eaten, the time, and your dog's weight and any symptoms — have this ready for the expert.
- 5Follow professional guidance and go to the nearest emergency vet if you are advised to.
A consultation fee may apply to the Pet Poison Helpline. When in doubt, contact your own veterinarian or nearest emergency clinic.
Frequently asked questions
- Are rhubarb leaves dangerous to dogs?
- Yes. Rhubarb leaves and greens are the toxic part, containing soluble calcium oxalates and oxalic acid. Ingestion can cause drooling, vomiting, tremors, low blood calcium, and in serious cases kidney injury or failure. Treat any leaf ingestion as an emergency.
- Can dogs eat the rhubarb stalk (the part used in pies)?
- The stalk itself contains only trace amounts of soluble oxalate and is considered essentially non-toxic by the ASPCA and Pet Poison Helpline. But it is not a good dog treat — it is very tart and fibrous and can cause stomach upset, and prepared rhubarb dishes are usually high in sugar and may contain xylitol, which is toxic to dogs.
- What should I watch for if my dog ate rhubarb?
- Watch for excessive drooling, vomiting, weakness, muscle tremors, and signs of kidney trouble such as increased thirst or reduced urination. Because rhubarb leaves can cause kidney damage and low blood calcium, contact your veterinarian or a pet poison hotline right away rather than waiting for symptoms.
Sources
Last updated 2026-06-25
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This page is for general educational purposes and is not a substitute for professional veterinary advice. Toxicity can vary with the amount eaten, your dog's size, and individual sensitivity. If you suspect poisoning, contact a veterinarian or poison-control hotline immediately.