Can dogs eat grapes?

No — grapes are toxic

No. Grapes and raisins can cause sudden kidney failure in dogs. Tartaric acid is now identified as the likely culprit, and there is no safe amount.

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✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last updated: 2026-06-17

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Grapes, raisins, sultanas, and currants are among the most dangerous foods a dog can eat. Until recently the exact toxic compound was unknown, but veterinary toxicologists have now identified tartaric acid (and its salts) as the likely cause of grape poisoning in dogs. This is why cream of tartar — a tartaric acid salt used in baking and homemade playdough — also poses a risk. The reaction is unpredictable: some dogs eat a grape and seem unaffected, while others develop acute kidney failure after a few. Because there is no way to know how your dog will respond, all ingestion should be treated as a medical emergency. This applies to green, red, black, seeded, seedless, peeled, and organic grapes equally.

Check individual ingredient safety at 247IngredientsCheck.

If your dog has already eaten grapes

  • Call your vet immediately — even if your dog seems completely fine
  • If your vet is closed, call an emergency vet or the ASPCA Animal Poison Control Center on (888) 426-4435 or Pet Poison Helpline on (855) 764-7661 (24/7, fees apply)
  • Do NOT induce vomiting yourself unless your vet specifically tells you to
  • Try to count or estimate how many grapes or raisins were eaten
  • Note the time it happened — treatment is most effective in the first 1–2 hours
  • If the dog brings up grapes on its own, take a photo for the vet

Risks to watch for

  • Acute kidney failure
  • Vomiting and diarrhea within 24 hours
  • Lethargy and weakness
  • Loss of appetite
  • Reduced or absent urination (late sign of kidney damage)
  • Fishy breath (uraemic breath) in severe cases

Safe portion size

None. No amount is considered safe for any dog, of any size or breed.

Safer alternatives

  • Blueberries (a much safer sweet-treat swap)
  • Seedless watermelon chunks
  • Apple slices (core and seeds removed)
  • Strawberry halves

Safe fruit alternatives to grapes

If your dog enjoys a fruity snack, blueberries, seedless watermelon, and sliced apple (seeds and core removed) are all safe, low-risk options that give the same juicy treat experience without the tartaric acid risk. None of these substitutes carry any known kidney-toxicity risk in dogs.

Common questions

My dog only ate one grape — do I really need to call the vet?
Yes. The toxic dose varies enormously between dogs and even between grape batches (tartaric acid levels differ). A single grape has caused kidney failure in small dogs. Veterinary advice is consistent: treat any ingestion as potentially serious.
Are raisins more dangerous than fresh grapes?
Yes. Raisins, sultanas, and currants are dried grapes — the tartaric acid is more concentrated by weight, so fewer raisins are needed to cause the same harm.
Can dogs eat grape jelly, grape juice, or wine?
No. Anything made from grapes carries the toxicity risk, including jelly, jam, juice, and wine. Wine adds the extra danger of alcohol poisoning.
Why is cream of tartar on the warning list?
Cream of tartar is a salt of tartaric acid — the same compound believed to cause grape toxicity. It's commonly used in homemade playdough recipes, which dogs often eat. Shop-bought playdough is generally safer but should still be kept away.
What if my dog has eaten grapes before with no problem?
Previous tolerance does not make future exposure safe. The amount of tartaric acid varies between grapes, and reactions appear to be idiosyncratic. Don't rely on past outcomes.
Are grape seeds, skins, or stems less toxic than the flesh?
No. All parts of the grape carry the risk. Peeling or removing seeds does not make grapes safe.

Related foods

Raisins no Blueberries yes Strawberries yes Apples yes
Important: This page is general information, not veterinary advice. Every dog is different, and individual factors (age, breed, health conditions, medications) can change what's safe. If in doubt, always contact your vet — or the ASPCA Animal Poison Control Center on (888) 426-4435 or Pet Poison Helpline on (855) 764-7661 in the UK.