Can dogs eat grapes?
UNSAFE Category: Fruit · Source verified September 2026
Grapes and raisins are among the most dangerous human foods for dogs: even small amounts can cause sudden kidney failure, and the toxic mechanism is still not fully understood. Sensitivity varies wildly between individuals, so a dog that once ate grapes without symptoms can still be poisoned next time. There is no established safe amount.
How much is dangerous?
- There is no established safe amount: sensitivity varies enormously between individual dogs, and the toxic substance itself is still unidentified.
- Published case reports put the lowest doses causing acute kidney injury at 19.6 g of grapes per kg of body weight (≈0.7 oz/kg) and 2.8 g/kg for raisins — which are dried, concentrated grapes.
- Kidney failure has been documented after as few as 4–5 grapes, while other dogs have eaten large amounts without injury — treat any ingestion as an emergency.
Dose data: Schweighauser et al., J Vet Intern Med (2020) · Eubig et al., J Vet Intern Med (2005).
Symptoms to watch for
- vomiting
- lethargy
- loss of appetite
- decreased urination
- tremors
Vomiting, lethargy and loss of appetite usually appear within the first 24 hours; kidney injury develops over the following 1–3 days.
If you suspect poisoning: call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 (available 24/7). Do not induce vomiting unless instructed by a professional.
Quick answers
Can dogs eat grapes?
No. Grapes and raisins are among the most dangerous human foods for dogs: even small amounts can cause sudden kidney failure, and the toxic mechanism is still not fully understood. Sensitivity varies wildly between individuals, so a dog that once ate grapes without symptoms can still be poisoned next time. There is no established safe amount.
How much grapes is toxic to a dog?
There is no known safe amount. The lowest published doses causing acute kidney injury are 19.6 g/kg of grapes (≈0.7 oz per kg of body weight) and 2.8 g/kg of raisins, and case reports include kidney failure after as few as 4–5 grapes. Sensitivity varies wildly between dogs, so call your vet after any amount.
What are the symptoms if my dog eats grapes?
Watch for vomiting, lethargy, loss of appetite, decreased urination, tremors. Vomiting, lethargy and loss of appetite usually appear within the first 24 hours; kidney injury develops over the following 1–3 days. When in doubt, call your vet.
What should I do if my dog ate grapes?
Call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 right away. Do not wait for symptoms — early treatment is dramatically cheaper and safer.
Related foods
Can dogs eat avocado? · Can dogs eat cherries? · Can dogs eat olives? · Can dogs eat lemons & limes? · Can dogs eat plums? · Can dogs eat peaches?
Source: ASPCA Animal Poison Control. This page is informational and is not veterinary advice.