Can Dogs Eat Grapes? Why Grapes and Raisins Are Toxic and What to Do

Last updated: November 2025

Why are grapes and raisins so dangerous for dogs?

Grapes look like the perfect healthy snack, which is exactly why they cause so much trouble. Many families have no idea they are toxic to dogs until a vet tells them.

The danger is the kidneys. Researchers at the ASPCA Animal Poison Control Center reviewed 43 dogs that developed kidney damage after eating grapes, raisins or both, between 1992 and 2002. Every one of those dogs vomited. Only 23 of them, or 53%, survived. Five died and 15 were euthanized, with a median of six days from the snack to the dog’s death. Weakness, wobbliness and making less urine were linked to a worse outcome.

This is not a rare problem either. In July 2025 the ASPCA reported that its Poison Control team had already handled more than 9,300 grape and raisin cases that year.

The good news is in those same records. ASPCA Poison Control said only one grape or raisin case in 2016 ended in death, and that dog did not see a vet until three days after eating the fruit. Speed is what changes the story. Dogs that get to a vet quickly, before the kidneys are hurt, usually go home fine.

Grapes sit alongside chocolate, xylitol and onions as one of the big kitchen dangers. Our guide to foods dogs can’t eat covers the rest of the list.

What makes grapes toxic to dogs?

For about 20 years, no one knew, and toxicologists treated every grape as an emergency because they had no better option.

That changed in 2021. In a letter in the Journal of the American Veterinary Medical Association, four veterinarians, including Dr. Colette Wegenast and Dr. Irina Meadows of the ASPCA Animal Poison Control Center, proposed that tartaric acid and its salt, potassium bitartrate, are the toxic principles in grapes. Their clue came from an unexpected place: a dog that ate homemade playdough made with cream of tartar, which is potassium bitartrate. The dog developed kidney failure and died, and its kidney tissue looked like the damage seen in grape cases.

The same team followed up in 2022 in the Journal of Veterinary Emergency and Critical Care. They described six dogs from the ASPCA database that developed acute kidney injury after eating tamarinds or cream of tartar, two foods very high in tartaric acid. None were decontaminated, treatment was delayed, and four of the dogs were euthanized. Their signs, lab results and kidney lesions matched grape poisoning.

Dogs appear to handle tartaric acid differently from people and many other animals, which may explain why a fruit that is harmless to us can damage their kidneys. It also helps explain the unpredictability. According to ASPCA toxicologists, the tartaric acid in grapes varies from 0.35% to 2%, depending on the type of grape, how it was grown and how ripe it is.

Tartaric acid is still the leading theory, not a proven fact, but cream of tartar and tamarind are now on the watch list too.

How many grapes are toxic to a dog?

There is no known safe number. That is hard to accept, but it is the honest answer.

The ASPCA’s own vets put it plainly. Dr. Maren Krafchik of the ASPCA Animal Hospital told the ASPCA in 2017 that some dogs can eat a bag of raisins or a handful of grapes and be fine, but others can eat just one grape and get sick. Pet Poison Helpline notes that the toxicity is not necessarily dose-dependent and that even small amounts can cause problems.

The 2005 study shows how wide the range is. Among dogs that ate only raisins and had an estimated amount, the median was about 448 grams, roughly a pound. Yet one dog in the same study developed kidney damage after only 10 to 12 grapes. A big dog is not automatically safe, and a small dog is not automatically doomed.

Size still plays a part when toxicologists assess risk. In one 2025 case described by the ASPCA, a five-year-old Chihuahua mix named Lula ate some raisin bran cereal that fell on the floor. Senior toxicologist Dr. Tina Merola judged that, at Lula’s weight, age and history, she would have needed to eat more than two raisins to cause concern. The family watched her closely for 48 hours, and she was fine.

That kind of judgment call belongs to a toxicologist who knows the dog’s details, not to a chart online.

Raisins, sultanas and Zante currants are dried grapes, so weight for weight they pack more fruit into each bite. Treat one raisin as seriously as one grape. And remember that “organic,” “seedless,” “green” and “homegrown” make no difference. Pet Poison Helpline reports toxicity even with organic, pesticide-free grapes from home gardens.

What are the symptoms of grape poisoning in dogs?

Vomiting is almost always first. In the 2005 study, every dog vomited, and 81% did so within the first 24 hours. Owners often saw grapes or swollen raisins in the vomit, which is a helpful clue if you did not see your dog eat them.

Other early signs tend to follow the vomiting within that first day:

• Loss of appetite (47% of dogs in the study)
• Lethargy or low energy (35%)
• Diarrhea, sometimes with fruit in it (28%)
• Belly pain, tremors or excessive thirst

The kidney signs come later. Kidney trouble often shows up 24 to 48 hours after eating, and it can keep developing over several days. Watch for drinking much more than usual, peeing a lot and then suddenly very little, weakness, stumbling, bad breath that smells like ammonia and a dog that seems to get worse instead of better.

Making little or no urine is the most serious warning sign. It means the kidneys may be shutting down, and the 2005 study linked it to a worse outcome. Weakness and a drunken, wobbly walk were also red flags.

Here is the catch. By the time these later signs appear, the kidneys are already injured. That is why vets and poison control centers say not to wait for symptoms. A dog that ate grapes an hour ago and seems perfectly happy is the dog with the best chance, because treatment can start before damage begins.

If you only find an empty bag, call anyway. A toxicologist can still help, even hours later.

What should you do if your dog ate a grape or raisin?

Act now, even if your dog seems fine. Here is the order that gives your dog the best odds.

1. Move your dog away from the food and pick up anything left so no one else eats it.
2. Note the details. What was eaten, roughly how much, when, and your dog’s weight. Keep the bag or recipe.
3. Call your vet or a poison hotline. Pet Poison Helpline is 855-764-7661 and ASPCA Animal Poison Control is 888-426-4435. Both are open 24/7, and a consultation fee may apply.
4. Call ahead to the clinic so the team is ready when you arrive.
5. Bring the packaging and any case number the hotline gives you.

The Animal Emergency and Referral Center of Minnesota treats a witnessed or strongly suspected grape, raisin or currant ingestion as an urgent case and advises owners not to wait for visible symptoms. The ASPCA’s medical director explained why.

“The problem with grapes and raisins is that we don’t know which animals are going to develop kidney failure, and if we wait, the animal may not make it.”

Dr. Tina Wismer, Medical Director, ASPCA Animal Poison Control Center (ASPCA News, 2017)

For a wider game plan that covers any swallowed item, see our step-by-step guide for when your dog ate something it shouldn’t.

How do vets treat grape poisoning, and what does it cost?

There is no antidote for grape or raisin poisoning. Treatment has two goals: get as much fruit out of the body as possible, and protect the kidneys while the danger window passes. The 2005 study authors recommended that vets consider inducing vomiting, giving activated charcoal and starting fluid therapy whenever a dog has recently eaten grapes or raisins, because there is no way to know which dog will develop kidney failure.

The first step is decontamination. If your dog ate the fruit recently and is not yet showing signs, your vet will usually give an injection that makes your dog vomit. Grapes and raisins can sit in the stomach for a while, so this can still help a few hours after the snack. Many dogs then get activated charcoal, which binds what is left in the gut so less is absorbed.

Next comes fluid therapy. Most dogs are hospitalized on IV fluids for about 48 hours, sometimes longer. The fluids help flush the kidneys and keep blood flowing to them during the period when injury is most likely to develop. The team will draw blood at the start to get baseline kidney values, then recheck them over the next few days to see whether BUN and creatinine, the main kidney markers, start to climb. They will also give anti-nausea medicine and watch how much urine your dog makes.

If the kidney values stay normal after this monitoring period, the outlook is excellent. If they rise, treatment becomes more intensive and can last a week or more. In the 2005 study, dogs that survived took a median of 30 days for creatinine to return to normal, and some still had abnormal kidney values weeks or months later. That is why early care is so much better than late care, both for your dog and for your budget.

Cost depends on timing, your location and how sick your dog gets. In a guide published in November 2025, Healthy Paws listed toxin ingestion cases at about $300 to more than $5,000. Its sample bill for a dog that needed decontamination and a 48-hour hospital stay looked like this: an emergency exam at $150, bloodwork at $275, induced vomiting at $150, activated charcoal at $100, 48 hours of hospitalization with IV fluids at $900 and monitoring at $500, for a total of $2,075. The same guide put IV fluids at $50 to $200 a day, standard hospitalization at $200 to $600 a day and ICU care at $500 to $2,000 a day.

A quick call to a poison hotline costs far less than any of this and often decides whether a trip to the clinic is needed. If your dog does need treatment, ask your vet for an estimate up front, and ask whether outpatient monitoring is an option for a very small exposure. Never skip the visit to save money when a toxicologist says your dog needs care. A day or two of fluids is far cheaper, and far kinder, than treating kidney failure.

Which foods hide grapes, raisins and currants?

Most grape cases do not involve a bowl of grapes. They involve something that has raisins or currants baked or mixed in, which owners do not think of as fruit. Holiday baking season is prime time, with Thanksgiving stuffing, Christmas fruitcake and cookie trays all within nose reach.

The Animal Emergency and Referral Center of Minnesota lists scones, muffins, fruitcakes, bread, cookies, trail mix, granola, jams, salads, stuffing and wine as common places these fruits show up. Pet Poison Helpline adds bagels and grape-containing products in general.

Holiday tables bring other risks, too. Cranberry sauce is a common question at Thanksgiving, and our guide on whether dogs can eat cranberries explains which versions are fine. Spiced cookies bring their own concerns, covered in our post on whether dogs can eat gingerbread.

Are cream of tartar, grape juice and grape seed extract safe for dogs?

These are the most common follow-up questions now that tartaric acid is the leading suspect.

Cream of tartar is potassium bitartrate, the same compound proposed as the problem in grapes. It is the reason the toxin theory exists, since dogs that ate homemade playdough made with it developed kidney failure. Tufts University’s Petfoodology team advised in 2021 that it is probably a good idea to avoid giving dogs commercial or homemade foods with cream of tartar as an ingredient. They also flagged homemade dog treat recipes, including dog versions of snickerdoodles, that call for it. Homemade playdough is doubly risky because it is also packed with salt.

Tamarind is another one to keep away. ASPCA toxicologists suggest owners take extra care with tamarind paste, and the 2022 case series linked tamarind to kidney injury in four dogs.

Grape juice and wine are processed to remove excess tartrates, and so far they have not been tied to grape-style kidney injury. That does not make them treats. Juice is sugary, and wine contains alcohol, which is dangerous for dogs on its own.

Grape seed extract shows up in some joint and senior supplements for pets. A 2016 study in BMC Veterinary Research fed dogs a grape and blueberry extract for 24 weeks, at up to ten times the intended dose, and found no signs of kidney or liver damage. The authors noted that the European pet food industry federation did not consider grape seed extracts a threat. Still, that was one specific pet product. Do not give your dog human supplements, and check with your vet before starting any product with grape ingredients.

Can cats eat grapes?

No. Most grape poisoning reports involve dogs, but cats are not considered safe. The ASPCA noted in 2017 that cats may also be affected, and Pet Poison Helpline reports anecdotal cases in cats and ferrets. The Animal Emergency and Referral Center of Minnesota lists grapes, raisins, sultanas and Zante currants as toxic to dogs, cats and ferrets.

Cats are less likely to snack on fruit, but a curious kitten might chew a grape or nibble a raisin cookie. Treat a cat exposure exactly like a dog exposure: call your vet or a poison hotline right away and do not wait for vomiting.

Cats have their own list of dangerous foods, from onions to lilies in the bouquet. See our guide to foods cats can’t eat for the full rundown.

How can you keep your dog safe from grapes during the holidays?

Prevention is mostly about habits and counter space, especially when guests and kids are around.

• Store dried fruit high. Keep raisins, trail mix and baking supplies in closed cabinets, not on low shelves or open counters.
• Brief your guests. Ask visitors and kids not to share snacks, and to keep plates off the coffee table.
• Use a lidded trash can. Leftover stuffing and fruitcake scraps are tempting targets.
• Give your dog a safe spot with a chew or puzzle toy while you cook and serve.
• Save the numbers. Put Pet Poison Helpline and ASPCA Poison Control in your phone, and add them to your pet first aid kit.

Busy holidays also mean open doors. A dog that slips out while guests arrive needs ID that does more than list a phone number. The free Lohji app, on the App Store and Google Play, powers the Shiloh’s House Smart Tag. When a finder taps the tag with a phone, no app needed, your dog’s profile opens with one-tap call and text for up to three guardians, plus medical notes and your veterinarian’s details. If your dog is recovering from a scare like grape poisoning, you can add that to the medical notes instantly, with no re-engraving. The tag is an NFC ID tag, not a GPS tracker.

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