Can dogs eat grapes?
No — grapes, raisins, sultanas, and currants can cause acute kidney failure in dogs. There is no known safe dose. Call your vet immediately if any amount has been eaten.
The exact toxin in grapes is still being researched (tartaric acid is the leading suspect). What's clear: reactions are unpredictable, and dogs have developed kidney failure from as little as one grape. Raisins are more concentrated than fresh grapes.
Watch out for
- No established safe dose — reactions vary wildly between dogs.
- Raisins, sultanas, and currants are more concentrated than fresh grapes.
- Hidden sources: scones, hot cross buns, cereal bars, trail mix, Christmas puddings.
- Symptoms (vomiting, lethargy) typically start 6–24 hours after eating.
- Kidney injury can develop 24–72 hours later — by then treatment is much harder.
Frequently asked
My dog ate a grape — is that enough to hurt them?
Possibly. There is no safe dose, but not all dogs react. Call your vet anyway — decontamination within 2 hours dramatically improves outcomes, whether or not symptoms have started.
Are raisins worse than grapes?
Per gram, yes — raisins and sultanas are more concentrated. A small raisin bun can contain more of the toxin than a whole bunch of grapes.
What about grape-flavoured foods?
Artificial grape flavouring is not the concern. The risk is specifically real grapes, raisins, sultanas, currants, wine, and grape juice.
How soon do symptoms appear?
Vomiting typically at 6–24 hours. Kidney markers rise on bloodwork at 24–72 hours. Some dogs stay asymptomatic before declining rapidly, which is why early vet assessment matters.
Can some dogs eat grapes safely?
Apparently yes — some dogs tolerate grapes without issue. The problem is you cannot tell in advance which dogs will react. Treat every ingestion as potentially toxic.
More food guides
Check our toxic-food tool for quick answers, or ask CRO about your specific dog.
This guide is educational and based on US veterinary sources. Individual dogs react differently — introduce any new food slowly, and speak to your vet if your dog has medical conditions like pancreatitis, diabetes, or allergies.