Grape & Raisin Toxicity

Assess the risk of grape or raisin ingestion in dogs. Sensitivity varies wildly.

Ingestion Details

Dog Weight

Unit

Amount Eaten

Type

Risk Assessment

Moderate Risk

Calculated Risk Level

Grape and raisin toxicity is highly idiosyncratic.

Estimated Magnitude1.84g/kg

Toxicity Risk Spectrum

IMMEDIATE VETERINARY ATTENTION REQUIRED

Sensitivity varies wildly between individual dogs. Some can die from just 3-4 raisins.

The Tartaric Acid Mystery

For decades, the toxic agent in grapes was unknown. In 2021, researchers identified Tartaric Acid as the culprit. Grapes, raisins, and tamarinds contain high concentrations. Unlike chocolate, there is no 'safe' dose because some dogs are hyper-sensitive and suffer kidney failure from tiny amounts.

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Pro Tips

No Safe Dose: Do not wait for symptoms. If any grapes were eaten, call a vet or poison control immediately.
Zante Currants: These are small raisins and are just as toxic.
Kidney Failure: The primary danger is Acute Renal Failure, which can occur within 24-72 hours.
Early Decontamination: If caught within 1-2 hours, inducing vomiting can be life-saving.

Fun Facts

"The 'Tartaric Acid' connection was discovered thanks to a playdough recipe using cream of tartar!"
"Older raisins tend to be more concentrated and therefore more toxic by weight."
"Some dogs have eaten grapes their whole lives with no issue—this doesn't mean it's safe for yours."
"Grape juice and wine carry the same tartaric acid risk."

Formula: Idiosyncratic Reaction Threshold

Used with this

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