Every dog is different. Individual allergies and sensitivities are common — always introduce new foods in small amounts and watch for adverse reactions. This site is for informational purposes only and is not veterinary advice. Always consult your vet.
The Full Picture
Grapes and raisins are highly toxic to dogs. Even small amounts can cause vomiting, diarrhea, lethargy, and acute kidney failure. The exact toxic substance is still being researched, but tartaric acid is suspected. All grape varieties (red, green, seedless, peeled) and grape products (raisins, currants, juice) are dangerous. If your dog eats grapes, contact your vet or poison control immediately.
What You Should Know
Grapes should be kept well away from dogs. If your dog has eaten grapes, watch for symptoms such as vomiting, diarrhea, lethargy, or loss of appetite. In an emergency, contact your veterinarian or an animal poison helpline straight away.