Can Dogs Eat Grapes?
No. Grapes and raisins are toxic to dogs and can cause sudden kidney failure — even a small amount can be dangerous.
Why grapes are dangerous for dogs
Grapes (and raisins, which are just dried grapes) can cause acute kidney failure in dogs. The exact toxic substance hasn't been definitively identified, and no safe amount has been established — some dogs have developed kidney failure after eating just a few grapes, while others have eaten more without apparent harm. Because there's no way to predict which dogs will react badly, vets treat any grape or raisin ingestion as a potential emergency.
What to do if your dog eats grapes
- Contact your vet or an emergency animal poison control hotline immediately — don't wait for symptoms.
- Try to know roughly how many grapes or raisins were eaten and when.
- Your vet may induce vomiting and start supportive treatment, especially if it's caught within a couple of hours.
Signs of grape toxicity
Symptoms, if they appear, typically develop within 6–24 hours and can include vomiting, diarrhea, lethargy, decreased appetite, and abdominal pain — signs of kidney injury may not show up on standard tests for a day or more, which is part of why early veterinary contact matters even before symptoms appear.
Foods in the same "avoid entirely" category
Grapes and raisins join a short list of foods considered unsafe at essentially any dose for dogs: chocolate, xylitol (an artificial sweetener), onions and garlic, and macadamia nuts. Keep these well out of reach, including cooked dishes and baked goods that contain them (raisin bread, trail mix, etc.).