The consumption of grapes and raisins presents a potential health threat to dogs. Their toxicity to dogs can cause the animal to develop acute kidney injury (the sudden development of kidney failure) with anuria (a lack of urine production).
Brutlag A: Grape, Raisin and Currant Poisoning in Dogs. VCA Hospitals.
Learn why grapes & raisins are toxic to dogs, the symptoms to watch for & what to do if your dog eats them. Act fast & protect your pet by calling a vet today.

Grapes and raisins can cause severe toxicity in dogs that can potentially cause death.There is no well-established toxic dose of grapes for dogs. The amount of grapes that can cause toxicity signs in dogs has been recorded to be as low as 0.3 ounces of grapes per pound of body weight.
Overview of Canine Grape and Raisin Toxicity. Ingestion of grapes or raisins can be toxic to dogs.Studies suggest the lowest documented toxic raisin dose is 0.1 oz/kg and 10 to 12 grapes in a 20 pound dog.
Why Are Grapes and Raisins So Toxic? The culprit is tartaric acid, found in all kinds of foods from tamarinds to cream of tartar but most concentrated in grapes and raisins. Toxicity varies with the size of the animal and the amount consumed.
Why Are Raisins Bad for Dogs? Grape and raisin toxicity in dogs can cause serious kidney damage that can lead to acute (sudden) kidney failure, which can be fatal.
Free grape and raisin toxicity calculator for dogs. Enter your dog's weight and the type and amount consumed to get an instant risk assessment. Includes emergency vet contacts and guidance.