Fruit · Food guide
Can dogs eat grapes?
Grapes and raisins can cause acute kidney failure in dogs. There is no safe amount. Even a few grapes can be dangerous.
Not a substitute for advice from your vetUpdated Sep 26, 2026
AI imageDid your dog eat grapes?
Call your vet or an emergency vet right away, even if your dog still seems fine. Don't try to make your dog vomit yourself. On the phone, say what your dog ate, how much, when, and how much your dog weighs.
Why grapes are toxic to dogs
Why it's dangerous
- Applies to all kinds: green, red, seedless, organic
- Raisins, sultanas and currants are concentrated and especially dangerous
- Hidden in muesli, stollen, raisin buns and trail mix
- There's no way to predict how strongly a dog will react
Signs of poisoning
- Vomiting, often within a few hours
- Diarrhea, loss of appetite, tiredness
- Belly pain, trembling
- Later: little or no urine
Keep an eye on dangerous foods
Kahuno shows you what your dog must not eat
Dogs should never eat grapes. If the dangerous ingredient shows up in a food or snack, Kahuno shows the red safety rating the moment you log it, for everyone in the household who feeds the dog.
Frequently asked questions
How many grapes are toxic to dogs?
There's no way to say. Some dogs seem to tolerate a grape or two, others get sick after just a few. So the rule is: not a single one.
Why are grapes toxic to dogs?
The likely culprit is the tartaric acid in grapes and raisins, which dogs clear from their bodies less well than humans do. This hasn't been fully proven yet.
My dog ate a grape. What should I do?
Call your vet or an emergency vet right away, even if your dog still seems fine. The vet can often make your dog vomit while the grapes are still in the stomach.
Can dogs have grape juice or raisin bread?
Processed grapes and raisins are dangerous too.
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- FEDIAF Nutritional Guidelines for Complete and Complementary Pet Food for Cats and Dogs, September 2025, Kapitel 7.7.1, Grape and raisin toxicity in dogs.