Updated 2026-08-07 · Source: ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets; VCA Animal Hospitals — pet health library · Free · No sign-up
No — grapes and raisins are toxic to dogs, even in small amounts. Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 now.
If your dog may have eaten something harmful, call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 right now — don't wait for symptoms. A consultation fee may apply to the ASPCA hotline.
Verdict for dogs
Toxic
Severity
5 / 5 — Emergency — can be fatal, and small amounts can matter. Call now.
Safe amount
None
Category
Fruit
Source
ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets; VCA Animal Hospitals — pet health library · reviewed 2026-08-07 · confidence: high
Why
Grapes, raisins, sultanas and currants can cause sudden kidney failure in dogs. Tartaric acid is the suspected toxin, and dogs cannot process it. There is no known safe amount — small dogs have been poisoned by a handful, and some dogs by a single serving.
Signs to watch for if your dog has eaten grapes and raisins
Vomiting, often within a few hours
Diarrhea and loss of appetite
Unusual tiredness or weakness
Drinking and urinating more than usual — or suddenly not urinating at all
Belly pain
Signs vary with the amount and with the individual pet, and some appear only after a day or more. Their absence does not mean your dog is in the clear — call rather than watch.
What to do now
Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 straight away. Tell them what your dog ate, roughly how much, and when, and take the packaging with you. Don't wait for symptoms — with several poisons the harm is done before a pet looks ill.
Never induce vomiting and never give any medicine unless a vet tells you to. With some substances it causes more damage than the poison. This page tells you when to get help — it never tells you how to treat at home.
Safer alternatives for dogs
Plain baby carrots or carrot sticks
Plain cooked chicken breast — no skin, no bones, no seasoning
A few blueberries or a slice of apple with the core removed
Verdicts are transcribed from the cited veterinary sources, never inferred. Where a source establishes a finding for one species only, the other species is left null and the page says to ask your vet — a dog finding is never copied onto a cat.
This page is a reference, not veterinary advice or a diagnosis. CanMyPetEat is a reference, not veterinary advice or a diagnosis. It tells you when to get help — never how to treat at home. Never induce vomiting or give any medicine unless a vet tells you to. Individual pets vary and toxicity guidance changes; your vet and the ASPCA Animal Poison Control Center are the authority.
No — grapes and raisins are toxic to dogs, even in small amounts. Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 now. Grapes, raisins, sultanas and currants can cause sudden kidney failure in dogs. Tartaric acid is the suspected toxin, and dogs cannot process it. There is no known safe amount — small dogs have been poisoned by a handful, and some dogs by a single serving.
What happens if a dog eats grapes and raisins?
Watch for: Vomiting, often within a few hours; Diarrhea and loss of appetite; Unusual tiredness or weakness; Drinking and urinating more than usual — or suddenly not urinating at all; Belly pain. Signs can take hours or, for some poisons, a day or more to appear, so call your vet rather than waiting to see.
How many grapes and raisins are dangerous for a dog?
There is no known safe amount — small quantities have caused serious harm, so treat any exposure as urgent and call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.