Can dogs eat grapes?
If your dog has just eaten grapes
Do this now
- Call your vet immediately — even if your dog seems completely fine
- If your vet is closed, call an emergency vet or the Animal PoisonLine on 01202 509000 (24/7, fees apply)
- Do NOT induce vomiting yourself unless your vet specifically tells you to
- Try to count or estimate how many grapes or raisins were eaten
- Note the time it happened — treatment is most effective in the first 1–2 hours
- If the dog brings up grapes on its own, take a photo for the vet
What your vet will want to know
Have this information ready when you call:
- Type: fresh grapes, raisins, sultanas, currants, or hidden in a food like mince pies?
- Approximate amount eaten (count if possible)
- Time of ingestion (or best estimate)
- Your dog's weight
- Any existing health conditions or medications
- Whether your dog has vomited on their own
The full picture
Grapes, raisins, sultanas, and currants are among the most dangerous foods a dog can eat. Until recently the exact toxic compound was unknown, but veterinary toxicologists have now identified tartaric acid (and its salts) as the likely cause of grape poisoning in dogs. This is why cream of tartar — a tartaric acid salt used in baking and homemade playdough — also poses a risk. The reaction is unpredictable: some dogs eat a grape and seem unaffected, while others develop acute kidney failure after a few. Because there is no way to know how your dog will respond, all ingestion should be treated as a medical emergency. This applies to green, red, black, seeded, seedless, peeled, and organic grapes equally.
Risks to watch for
- Acute kidney failure
- Vomiting and diarrhoea within 24 hours
- Lethargy and weakness
- Loss of appetite
- Reduced or absent urination (late sign of kidney damage)
- Fishy breath (uraemic breath) in severe cases
Symptom timeline
Symptoms typically progress in stages. Knowing what to expect helps you act fast:
- Within 6–12 hours Vomiting (often the first sign), sometimes with undigested grapes
- 12–24 hours Loss of appetite, lethargy, diarrhoea, increased thirst
- 24–48 hours Reduced urination — a late sign that the kidneys are failing
- 48–72 hours Severe kidney damage; at this stage outcomes are much worse without aggressive veterinary care
Breed-specific warnings
- Flat-faced breeds (pugs, bulldogs, Pekingese, French bulldogs, Boston terriers): never induce vomiting at home — they have a high risk of aspiration pneumonia. Always go straight to the vet.
- Smaller dogs reach toxic doses on fewer grapes. A single grape can be serious for a small breed.
Safe portion size
None. No amount is considered safe for any dog, of any size or breed.
Safer alternatives
- Blueberries (a much safer sweet-treat swap)
- Seedless watermelon chunks
- Apple slices (core and seeds removed)
- Strawberry halves
Common questions
My dog only ate one grape — do I really need to call the vet?
Yes. The toxic dose varies enormously between dogs and even between grape batches (tartaric acid levels differ). A single grape has caused kidney failure in small dogs. Veterinary advice is consistent: treat any ingestion as potentially serious.
Are raisins more dangerous than fresh grapes?
Yes. Raisins, sultanas, and currants are dried grapes — the tartaric acid is more concentrated by weight, so fewer raisins are needed to cause the same harm.
Can dogs eat grape jelly, grape juice, or wine?
No. Anything made from grapes carries the toxicity risk, including jelly, jam, juice, and wine. Wine adds the extra danger of alcohol poisoning.
Why is cream of tartar on the warning list?
Cream of tartar is a salt of tartaric acid — the same compound believed to cause grape toxicity. It's commonly used in homemade playdough recipes, which dogs often eat. Shop-bought playdough is generally safer but should still be kept away.
What if my dog has eaten grapes before with no problem?
Previous tolerance does not make future exposure safe. The amount of tartaric acid varies between grapes, and reactions appear to be idiosyncratic. Don't rely on past outcomes.
Are grape seeds, skins, or stems less toxic than the flesh?
No. All parts of the grape carry the risk. Peeling or removing seeds does not make grapes safe.
Unexpected vet bills can run into thousands
One emergency visit for food poisoning can cost £500–£5,000+. Compare UK pet insurance in 60 seconds.
Compare pet insurance →Checked against UK veterinary guidance — see our editorial standards and source list. If your dog has eaten something and you need urgent advice, call a vet or the Animal PoisonLine on 01202 509000.