Dog ate grapes or raisins
If your dog has eaten grapes, raisins, sultanas or currants, call a veterinarian or poison control line now. These fruits can cause acute kidney injury in dogs, and the toxic dose is unpredictable — some dogs react to small amounts while others seem unaffected, so it is not safe to wait and see. Early treatment to decontaminate and protect the kidneys gives the best outcome. Note how much was eaten and when, and contact your vet straight away.
Go to a vet now if
- Any ingestion of grapes, raisins, sultanas or currants
- Vomiting or diarrhoea, often within hours
- Reduced or no urination, lethargy, or loss of appetite (possible kidney injury)
- Uncertainty about the amount — treat as an emergency
Call a vet today if
- There is no reliable safe amount — always call promptly rather than waiting
What to tell the vet
- What and how much was eaten
- When it happened
- Your dog's weight
- Any vomiting, diarrhoea or change in urination
- Existing kidney or other conditions
- Any medicines your dog takes
What not to do
- Do not assume a small amount is safe — sensitivity varies between dogs
- Do not make your dog vomit unless your vet directs you to
- Do not wait for symptoms before contacting a vet
What your vet may check
Your vet may induce vomiting if recent, give activated charcoal, and start intravenous fluids to protect the kidneys, with blood tests to monitor kidney values over a few days.
Recovery support after veterinary assessment
If the kidneys are protected early, many dogs do well. Your vet will monitor kidney values and guide feeding during recovery; any supportive nutrition is used on veterinary advice only.
Frequently asked questions
How many grapes are toxic to a dog?
There is no safe number — sensitivity varies widely and some dogs react to small amounts. Treat any grape or raisin ingestion as a reason to call your vet immediately.
What happens if a dog eats raisins?
Raisins (dried grapes) carry the same risk of acute kidney injury and are more concentrated. Signs can include vomiting, lethargy and reduced urination; early veterinary care is key.
My dog ate one grape — should I worry?
Because the toxic dose is unpredictable, it is safest to call your vet or a poison line even for a single grape, especially in a small dog.
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Sources & standards
Emergency guidance follows AVMA, Merck Veterinary Manual, ASPCA Animal Poison Control, and small-animal emergency-medicine standards, reviewed by our veterinary advisory board.