Can dogs eat grapes?
No. Dogs should never eat grapes. Grapes can cause kidney failure in dogs, and even a small amount can make a dog seriously ill. There is no way to predict which dogs will be affected, so any grape is a reason to call the vet.
Updated:
Why
Grapes, raisins and currants can damage a dog's kidneys. Tartaric acid is suspected to be the toxic part, and its amount varies between grapes, so the effect is unpredictable. Because the cause is still uncertain, vets treat any amount as a concern. Dogs that survive kidney injury may be left with long-term kidney disease.
Signs to watch for
- Vomiting or diarrhoea, often within 6–24 hours
- Tiredness and weakness
- Not wanting to eat
- Tummy pain
- Dehydration and drinking a lot
- Trembling
What to do
Contact your vet or a pet poison helpline right away, even if your dog ate only one or two grapes. Note how many were eaten and when. Don't wait for signs: the sooner a dog is treated, the better the outlook.
24-hour help by country →Questions and answers
Is one grape dangerous for a dog?
It can be. Nobody can predict which dogs will react, so any grape eaten is a reason to contact your vet.
Are green and red grapes equally risky?
Sources warn against all grapes, raisins and currants. The amount of the suspected toxin varies between grapes, so no kind is considered safe.
Related foods
All foods: What can dogs eat?Sources
- Which Human Foods Can Dogs Eat and Which Are Dangerous? — American Kennel Club (Updated Oct 21, 2026)
- Can Dogs Eat Grapes? Grape Toxicity in Dogs — VCA Animal Hospitals
- Grape, Raisin, and Tamarind (Vitis spp, Tamarindus spp) Toxicosis in Dogs — Merck Veterinary Manual
- People Foods to Avoid Feeding Your Pets — ASPCA Animal Poison Control
- Poisonous foods for dogs — Blue Cross
General information from the sources below, not reviewed by a vet and not a substitute for veterinary advice. When in doubt, call your vet.
How kids practise this in PetPrep
In PetPrep a child looks after a realistic dog: meals at the right times, water, walks and care. Knowing what is safe to share is part of being ready for a real pet.