My Dog Ate a Grape: What to Do Immediately

This pet health content was reviewed for accuracy by a veterinarian, Dr. Pippa Elliott, BVMS, MRCVS. This article was originally published in 2012 and is regularly updated. It was last reviewed for accuracy and updated on February 26, 2026.

If you have questions or concerns, call your vet, who is best equipped to ensure the health and well-being of your pet. This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. See additional information.

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Grapes can cause sudden kidney failure in dogs. There is no safe amount.

Grapes are one of the most unpredictable food toxins in dogs. Even small amounts have caused kidney failure. Because there is no safe dose, all grape ingestion should be treated as a medical emergency.

A number of common foods are toxic to pets, including grapes and raisins. Understanding why grapes are dangerous and how toxicity develops can help you act quickly and protect your dog.

Below, we explain what we currently know about grape toxicity in dogs, what symptoms to watch for, and what to do next.

Are Grapes Bad for Dogs?

Yes. Grapes are toxic to dogs, and the type or color does not matter. Even small amounts can cause kidney injury.

Are Raisins Toxic to Dogs?

Yes. Raisins are dried grapes and are also toxic to dogs. Because raisins are more concentrated, fewer pieces may cause problems.

Why Are Grapes and Raisins Bad for Dogs?

For years, the cause of grape and raisin toxicity was unclear because reactions vary widely between dogs. Research published by veterinarians at the ASPCA Animal Poison Control Center proposed tartaric acid as a key toxic component. Toxicity can be unpredictable, which is why any grape or raisin ingestion should be treated seriously.

Symptoms of Grape Poisoning in Dogs

A variety of symptoms are possible with grape toxicity in a dog, including: Vomiting Diarrhea Lethargy or weakness Loss of appetite Abdominal discomfort Increased or decreased thirst Decreased urination

Severe cases can progress to acute kidney failure.

How Long After Eating Grapes Do Symptoms Start?

Symptoms may begin within a few hours, but kidney injury can develop over several days. Typical progression: 0 to 6 hours: Vomiting (often the first sign)

• 6 to 24 hours: Lethargy, diarrhea, decreased appetite
• 24 to 72 hours: Signs of kidney injury, including decreased urination

Some dogs may not show obvious symptoms immediately. Kidney damage can occur before outward signs appear.

Because timing varies, veterinary evaluation is recommended even if your dog seems normal.

Can Grapes Kill a Dog?

Yes. Grapes can cause fatal kidney failure in some dogs. Prompt veterinary care improves the chances of recovery.

How Many Grapes Are Toxic to a Dog?

There is no known safe amount of grapes or raisins for dogs. Some veterinary references provide rough estimates for when risk may increase. Approximate amounts where risk may increase:

These estimates are based on rough guidelines. A clear dose-response relationship has not been established, and serious kidney injury has occurred after small amounts regardless of body weight.

Veterinary case reports document wide variability in outcomes. Some dogs have survived large ingestions, while others developed fatal kidney injury after consuming relatively few grapes.

According to the Merck Veterinary Manual, as few as 4 to 5 grapes have been associated with fatal kidney injury in an 18-pound dog.

Because reactions vary widely between dogs, any grape or raisin ingestion should be treated as a medical concern.

My Dog Ate A Grape: What Should I Do?

If your dog has eaten grapes or raisins, take action immediately. Do not wait for symptoms to appear.

1. Call a pet poison help center or your veterinarian.
2. Note how much and when.
3. Seek emergency care if advised.

Treatment of Grape Toxicity in a Dog

If your dog has ingested grapes or raisins, treatment focuses on preventing toxin absorption and protecting the kidneys. Depending on timing and clinical signs, veterinary care may include:

• Inducing vomiting: If ingestion occurred within the past 2 hours, a veterinarian may induce vomiting to remove stomach contents.
• Activated charcoal: This may be administered to help bind remaining toxins in the gastrointestinal tract.
• Intravenous (IV) fluids: Dogs are often hospitalized and given IV fluids for 24 to 48 hours to support kidney function and promote toxin elimination.
• Bloodwork monitoring: Blood chemistry panels are typically checked for up to 72 hours to monitor kidney values.
• Urinalysis: A urine test may be performed to evaluate kidney function. Learn more about what a urine test can show.
• Abdominal ultrasound: In some cases, imaging may be used to assess kidney size and structure. Learn more about abdominal ultrasound in dogs.
• Medications: Additional medications may be prescribed depending on the severity of kidney involvement.

Some dogs require hospitalization even if they are not yet showing symptoms. Early intervention significantly improves outcomes and may prevent permanent kidney damage.

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Preventing Grape Toxicity in Dogs

The best way to prevent grape toxicity is to avoid access altogether. To reduce risk:

• Keep grapes and raisins off counters and out of open pantries.
• Store them in sealed containers out of your dog’s reach.
• Make sure family members and guests understand that grapes and raisins are toxic to dogs.
• Supervise young children who may share snacks with pets.

These precautions apply to cats as well, as grapes and raisins are toxic to them.

If accidental ingestion occurs, contact your veterinarian promptly rather than waiting for symptoms to develop.

Frequently Asked Questions (FAQ)

For more information on other toxic foods, check out our article on How much chocolate is toxic to dogs.

If your dog shows any of these signs after eating grapes, go to an emergency vet immediately. These can develop within 24 to 72 hours of ingestion. For more on when to treat a pet situation as a true emergency, see 5 true dog emergencies you should never ignore.

What other common foods are toxic to dogs like grapes?

Several everyday foods can be dangerous to dogs. Along with grapes and raisins, common toxins include:

• Chocolate: Can cause vomiting, seizures, and heart problems. Darker chocolate is more dangerous.
• Onions and garlic: Damage red blood cells and can cause anemia, even in small doses.
• Xylitol: An artificial sweetener found in gum, candy, and some peanut butters. Causes rapid blood sugar crash and potential liver failure.
• Macadamia nuts: Can cause weakness, vomiting, and hyperthermia.
• Rat poison and other household toxins: Highly dangerous if ingested even in small amounts.

For a full guide on what to do when other toxins are involved, see our article on what to do if your dog ate rat poison. And for chocolate specifically, our detailed breakdown of how much chocolate is toxic to dogs is a helpful reference.

How is grape toxicity treated if my dog gets to the vet in time?

If treated promptly, the prognosis is much better. Within the first two hours, a vet will likely induce vomiting to remove as much of the grape as possible, followed by activated charcoal to bind remaining toxins. The dog will typically be hospitalized for 48 to 72 hours on intravenous fluids to flush the kidneys and prevent acute kidney injury from developing. Blood panels and urinalysis are monitored throughout. Dogs who receive treatment before kidney values rise have the best outcomes.

References

1. Campbell, Alexander, BSc. "Grapes, raisins and sultanas, and other foods toxic to dogs." UK Vet Companion Animal. January 2007. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.2044-3862.2007.tb00121.x.
2. Alexander, Terry. "Six Deadly Foods for Dogs." NBC 12 News. Feb. 15, 2011. http://www.nbc12.com/story/14029753/six-deadly-foods-for-dogs/.
3. Peterson, Michael E., DVM, and Patricia A. Talcott, MS, DVM, PhD, DABVT. Small Animal Toxicology. Elsevier Health Sciences. 2013.
4. Savigny, Michelle, DVM, and Douglass K. Macintire, DVM, DACVIM, DACVECC. "Grape and Raisin Toxicity in Dogs." Department of Clinical Sciences College of Veterinary Medicine, Auburn University. 2007.
5. Eubig, Paul A. et al. "Acute Renal Failure in Dogs After the Ingestion of Grapes or Raisins: A Retrospective Evaluation of 43 Dogs (1992–2002)." J Vet Intern Med 19 (2005): 663–74. https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1939-1676.2005.tb02744.x.
6. Banfield Health Hospital. "Grapes and Raisins Can Be Toxic to Your Pets." https://www.banfield.com/pet-healthcare/additional-resources/article-library/safety-tips/grapes-and-raisins-can-be-toxic-to-your-pets.
7. MSD Veterinary Manual. "Grape, Raisin, and Tamarind (Vitis spp, Tamarindus spp) Toxicosis in Dogs." https://www.msdvetmanual.com/toxicology/food-hazards/grape-raisin-and-tamarind-vitis-spp-tamarindus-spp-toxicosis-in-dogs.
8. ASPCA Animal Poison Control Center. "Toxic Component in Grapes and Raisins Identified." https://www.aspcapro.org/resource/toxic-component-grapes-and-raisins-identified.
9. WebMD Pet Health. "Why Dogs Can't Eat Grapes." https://www.webmd.com/pets/dogs/why-dogs-cant-eat-grapes.
10. PubMed Central. "Acute Kidney Injury in Dogs Following Ingestion of Cream..." https://pubmed.ncbi.nlm.nih.gov/35869755/.
11. Cornell University College of Veterinary Medicine. "Grape and Raisin Toxicity." Riney Canine Health Center. https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information/grape-and-raisin-toxicity
12. Bates N, Tizzard Z, Edwards N. "Acute Kidney Injury in Dogs Following Ingestion of Cream of Tartar and Tamarinds and the Connection to Tartaric Acid as the Proposed Toxic Principle in Grapes and Raisins." J Vet Emerg Crit Care (San Antonio). 2023 Nov-Dec;33(6):722-723. https://pubmed.ncbi.nlm.nih.gov/37943068/