Can Dogs Eat Grapes?
No — grapes and raisins can cause acute kidney injury in dogs. There is no known safe amount: some dogs have been severely affected by just a few grapes.
Last reviewed: July 24, 2026
Why are they dangerous?
The most treacherous part of grape toxicity is its unpredictability: the dangerous dose varies from dog to dog and cannot be known in advance. Current research points to tartaric acid in grapes as the likely culprit. Raisins are riskier than fresh grapes because the same compounds are concentrated into a smaller volume; cakes, cookies, and rice dishes containing raisins carry the same danger.
What to do if your dog ate grapes
Do not weigh the amount — even a single grape justifies calling your veterinarian immediately. Early treatment can stop the process before kidney damage develops. Do not wait for symptoms; vomiting and lethargy usually start within 24 hours, but the condition can also progress quietly.
Watch for these signs
- Vomiting and diarrhea within 24 hours
- Lethargy, loss of appetite
- Abdominal pain
- Increased or decreased thirst
- Reduced urination (a serious sign)
If you notice any of these, contact a veterinarian without waiting.
Frequently asked questions
Will a single grape hurt my dog?
It can — the toxic dose is unpredictable, and some dogs have been affected by very small amounts. If your dog ate even one grape, checking with your veterinarian is the safest move.
Why are raisins more dangerous?
Drying concentrates the same risky compounds into a small volume, so gram for gram raisins are worse. Raisins hidden in cakes and cookies count too.
Is grape juice risky as well?
Yes, drinks made from grapes carry the same suspect compounds. Wine adds alcohol poisoning on top.
Related answers
Sources
This guide is based on publications from the following veterinary bodies. Where sources differ, we take the more cautious position; the final decision is always your veterinarian's.