Is Rhubarb Toxic to Dogs?
Also known as: Pie Plant, Rheum rhabarbarum · Rheum rhabarbarum
What makes it toxic
Soluble oxalic acid and oxalates concentrated in the leaves. They bind calcium in the blood and crystallize in kidney tissue, while also irritating the gut directly.
Warning signs to watch for
Drooling, vomiting and diarrhea within a few hours; bigger leaf meals can add weakness, muscle tremors, mouth ulcers and reduced or changed urination over days.
What to do if your dog eats it
Take the leaves away, rinse the mouth and call your vet — mention the part and amount eaten. For a substantial leaf meal, the vet may recommend monitoring kidney values over several days.
Common questions
My dog ate a raw rhubarb stalk, not a leaf — is that OK?
Stalks are much less toxic and usually cause only mild stomach upset. Watch for vomiting, and call the vet if it persists or the dog seems unwell.
Is cooked rhubarb in pie dangerous for dogs?
Yes — dessert rhubarb still contains oxalates plus sugar, so keep pies and compotes off the menu entirely.
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.