Food safety · Dogs
Can Dogs Eat Grapes?
The short answer · Grapes for dogs
No. Grapes are toxic to dogs and can cause kidney damage. Tartaric acid is the suspected cause, and the Merck Veterinary Manual says more than one grape per 10 pounds of body weight may pose a risk. Call your vet or a pet poison line right away, even if your dog seems fine.
Written by VetExpenses Editorial TeamFact-checked against cited sources · Veterinary review pendingLast reviewed
Educational information, not veterinary advice. If your pet is unwell or ate something worrying, call your veterinarian or a pet poison line now. Emergency steps.
Grapes and dogs: quick facts
| Verdict | Toxic — do not feed |
|---|---|
| Toxic compound | Tartaric acid is the suspected toxic component (ASPCA, Merck). |
| Unsafe parts | Whole grapes, all colors; Seedless and seeded grapes; Grape products such as raisins |
| Signs to watch for | vomiting, diarrhea, lethargy, loss of appetite, excessive thirst, dehydration |
| When signs start | Vomiting or diarrhea usually within 6–12 hours; kidney failure can develop within 24–72 hours (Merck). |
| Risk by amount | Merck: in general, more than one grape or raisin per 4.5 kg (10 lb) of body weight may contain enough tartaric acid to pose a risk to the kidneys. Treat any amount as an emergency call. |
My dog ate grapes. What do I do?
- Stay calm and move your dog away from any remaining grapes. Keep the packaging if there is one.
- Call your veterinarian, an emergency vet, or a pet poison line right away — before signs appear. ASPCA Animal Poison Control: (888) 426-4435. Pet Poison Helpline: (855) 764-7661. A consultation fee may apply.
- Have ready: your dog's weight, roughly how much was eaten, and when.
- Do not make your pet vomit unless a veterinarian or poison control tells you to.
- Follow the vet's instructions. Early care by the veterinary team can make poisoning less severe.
What to know about grapes and dogs
Key points
- There is no safe way to prepare grapes for dogs. Keep fruit bowls, lunch boxes and trail mix out of reach.
- Raisins, sultanas and currants come from grapes; treat them the same way.
- Merck notes that once a dog stops producing urine from kidney failure, most dogs do not survive — which is why treatment starts before signs appear.
Risks
- Sudden kidney injury
- Vomiting and diarrhea
- Dehydration
What it could cost
Treating grapes poisoning in dogs
Poisoning care usually means an urgent exam, decontamination by the vet team, and sometimes days of monitoring. We publish a price range only after it is checked against named sources — our poisoning treatment and emergency vet visit guide is in verification. A vet bill for this kind of visit is usually built from these line items:
- Exam or emergency consultation fee
- Tests: bloodwork, urine tests or imaging
- Treatment, such as decontamination or medication
- Hospital stay and monitoring, if needed
- Follow-up visits and recheck tests
Other foods dogs ask about
Frequently asked questions
How many grapes are toxic to a dog?
The Merck Veterinary Manual says that, in general, more than one grape or raisin per 4.5 kg (10 lb) of body weight may contain enough tartaric acid to put the kidneys at risk. Because dogs react differently, call your vet or a poison line for any amount.
My dog ate one grape and seems fine. Is that OK?
Not necessarily. Signs often start 6–12 hours after eating, and kidney failure can develop over 24–72 hours (Merck). Call your vet or a pet poison line now so they can decide whether treatment is needed.
Why are grapes toxic to dogs?
The ASPCA and Merck point to tartaric acid as the suspected toxic component. Dogs can't process it well, and exposure can lead to kidney damage.
What will the vet do?
If the dog is still well, Merck describes prompt decontamination followed by IV fluids for at least 48 hours while kidney values are monitored.
Sources
- People Foods to Avoid Feeding Your Pets. ASPCA Animal Poison Control Center. Accessed November 7, 2026.
- Grape, Raisin, and Tamarind (Vitis spp, Tamarindus spp) Toxicosis in Dogs. Merck Veterinary Manual. Accessed November 7, 2026.
Was this helpful?