| 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 |
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.
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 — it can do more damage than the poison. What we will and won't tell you.
Can cats eat grapes and raisins? — Don't feed it to cats either.
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.
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. Some signs lag by a day — call, don't wait.
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.