Free pet poison triage tool
Grape & Raisin Toxicity Checker for Dogs
Yes, grapes are toxic to dogs: grapes, raisins, currants, and sultanas can cause sudden kidney failure, and there is no known safe amount. If your dog ate any, call your vet or a pet poison hotline right away.
Informational triage only, not veterinary advice or a diagnosis. This checker never tells you an amount is safe. Always contact a veterinarian. Everything runs in your browser; nothing is sent or stored.
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Call your vet or a pet poison hotline now
Whatever the amount, there is no known safe dose. Enter your dog's weight and what they ate to see how it compares to reported cases.
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Informational triage only, not veterinary advice or a diagnosis. Always contact a veterinarian.
Grape and raisin poisoning symptom timeline
- First 6-24 hours
Vomiting, often with pieces of grape or raisin, usually starts within 6-24 hours.
- Day 1
Diarrhea, lethargy, loss of appetite, and belly pain can follow over the next day.
- 24-72 hours
Acute kidney injury typically develops within 24-72 hours: drinking more, then urinating less or not at all.
- Next 48-72 hours
Kidney bloodwork (creatinine, BUN, SDMA) over 48-72 hours shows whether the kidneys are affected, often before signs appear.
Why grapes and raisins are dangerous for dogs
No safe amount has been established
Reported toxic cases range from a few grapes to large amounts, and many dogs that eat grapes never get sick. Because no one can predict which dogs are sensitive, vets treat every exposure as potentially serious.
Tartaric acid is the suspected toxin
In 2021 the ASPCA Animal Poison Control Center linked grape toxicity to tartaric acid, which dogs appear unusually sensitive to. Levels vary between grapes, which may explain why reactions are so unpredictable.
Cooked and dried forms count
Raisins, currants, and sultanas are concentrated dried grapes. Grape juice, jelly, jam, raisin bread, cookies, hot cross buns, and trail mix can all carry the same risk; baking does not make them safe.
Cats and ferrets may also be affected
Most reports involve dogs, but cats and ferrets may also develop kidney injury from grapes or raisins. Call your vet or a poison hotline for any pet that eats them.
What to do if your dog ate grapes or raisins
- Step 1
Remove any remaining grapes, raisins, or grape products and keep the packaging.
- Step 2
Note your dog's weight, what they ate, roughly how much, and when.
- Step 3
Call your vet, an emergency vet, or a pet poison hotline right away, even if your dog seems fine.
- Step 4
Do not induce vomiting at home unless a vet tells you to, and never use salt.
- Step 5
Take the copied or printed summary to the vet; expect possible induced vomiting, IV fluids, and kidney bloodwork over 48-72 hours.
Find your nearest emergency vet now, before you need directions: search "24-hour emergency vet near me" or check your regular vet's after-hours message, and save the number in your phone.
Grapes and dogs FAQ
Can dogs eat grapes?
No. Grapes, raisins, currants, and sultanas can cause sudden kidney failure in dogs, and no safe amount has been established. Do not feed any, including grape juice, jam, or baked goods with raisins.
How many grapes can kill a dog?
There is no known safe or lethal number. Some dogs have developed kidney failure after only a few grapes or raisins while others ate more with no signs, so any amount should be treated as an emergency risk and a vet called right away.
How long after eating grapes will a dog show symptoms?
Vomiting usually starts within 6-24 hours, often with diarrhea, lethargy, or loss of appetite. Acute kidney injury typically develops within 24-72 hours, so a dog that seems fine can still be affected and needs vet care before signs appear.
What should I do if my dog ate a raisin?
Call your vet or a pet poison hotline right away, even for a single raisin. Within about 2 hours a vet may induce vomiting; do not induce vomiting at home unless a vet tells you to, and never use salt.
Why are grapes toxic to dogs?
Tartaric acid is the suspected toxin, based on a 2021 finding from the ASPCA Animal Poison Control Center. Dogs appear unusually sensitive to it, and varying amounts in different grapes may explain why reactions are so unpredictable.
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