Why
Grapes and raisins can damage a dog's kidneys. The ASPCA names tartaric acid as the suspected toxin, and the AKC says no safe amount has been established.
What to do instead
- Do not feed grapes in any form, including raisins, currants and grape juice.
Safer swaps from the same group: apples, blueberries, pears, watermelon.
Warning signs
- Even one or two can be dangerous for some dogs.
- Watch for vomiting, diarrhea, lethargy or not drinking.
If your dog ate grapes
- Note how much your dog ate and when, and keep any packaging.
- Call your vet, an emergency clinic, ASPCA Animal Poison Control ((888) 426-4435) or the Pet Poison Helpline (855-764-7661).
- Don't make your dog vomit unless a vet tells you to.
Other fruit: quick answers
| Food | Verdict | Short answer |
|---|---|---|
| Avocado | Avoid | No. Avocado contains persin and is very high in fat. |
| Cherries | Avoid | No. Cherry pits, stems and leaves contain cyanide. |
| Bananas | Small amounts | Yes, as an occasional treat. Bananas are low in calories but high in sugar. |
| Cantaloupe | Small amounts | Yes, in moderation. It is low in calories but high in sugar. |
| Coconut | Small amounts | Yes, in small amounts. Keep the hairy husk away. |
| Cranberries | Small amounts | Yes, a few plain cranberries. Too many can upset the stomach. |
| Mango | Small amounts | Yes, peeled flesh in small amounts. Remove the hard pit. |
| Oranges | Small amounts | Yes, a segment or two of the flesh, without peel or seeds. |
Rules for any new food
- Plain is the rule: no salt, butter, oil, onion, garlic, sugar or sweeteners. Most of the danger in human food comes from what is added to it.
- Keep all treats under 10% of your dog's daily calories (WSAVA). The rest should come from a complete dog food.
- Check labels for xylitol, raisins, chocolate and macadamia nuts, which turn up in baked goods, snacks and spreads.
- If your dog has a health condition, such as diabetes, pancreatitis or kidney disease, ask your vet before adding any new food.
Frequently asked questions
Are grapes safe for dogs?
No. Grapes are highly toxic to dogs and can cause sudden kidney failure.
What should I do if my dog ate grapes?
Call your vet, an emergency clinic, or ASPCA Animal Poison Control at (888) 426-4435 right away. Note how much your dog ate and when.
Sources
- American Kennel Club, "Fruits and Vegetables Dogs Can and Can't Eat" (updated Aug 4, 2026)
- ASPCA Animal Poison Control, "People Foods to Avoid Feeding Your Pets"
Checked October 17, 2026. We are a reference, not a vet: if in doubt, call yours. How we check.