Can Dogs Eat Grapes?

Reviewed by Joana Babo, DVM

Joana is a veterinarian with both clinical and product background and a Master’s in Veterinary Medicine from ICBAS – University of Porto. As Veterinary Excellence Lead at Maven Pet, she ensures all content and product decisions are rooted in sound medical knowledge. With additional training in clinical behavior and product strategy, Joana helps shape intuitive, vet-informed solutions that support pets and their families.

Grapes are one of the best things about the Fall season. These tasty fruits are a very common treat for adults and kids! They may seem harmless and healthy… But are they a good idea for your canine friend? Can dogs eat grapes? Here is all you need to know on this subject!

Key takeaways
  • Grapes are toxic to dogs, causing severe kidney damage and potential failure, even from small quantities.
  • Symptoms of toxicity can appear 12-24 hours after ingestion, including vomiting, increased urination, and lethargy.
  • If a dog eats grapes, seek immediate veterinary care; do not induce vomiting without veterinary guidance.

Can dogs eat grapes?

a bunch of green grapes

No, grapes are not safe for dogs to eat.

The reason why grapes are poisonous to dogs remains a bit of a mystery. However, we are now sure that a chemical compound in this fruit is responsible for a fast and catastrophic kidney damage and consequent kidney failure. Usually there’s not much quantity needed to cause harm – for example, in a small dog, like a Chihuahua, one grape could be enough to cause damage.

The effect grapes have on the body is remarkably variable. Some dogs experience serious trouble only by eating a couple, while others only have symptoms if they delight themselves with a feast of grapes! Because the mechanism underlying the toxicity is unknown and the intensity of the side effects so unexpected, the best you can do is to avoid both fresh and dried grapes (raisins and sultanas).

What are the signs of toxicity?

a dog looking to the left, with a few bunches of grapes surrounding them

The symptoms tend to occur between 12-24 hours after the dog eats grapes. These can include:

  • Vomiting and/or diarrhea. You may see pieces of grapes in your dog’s stool or vomit.
  • Increased urination and drinking a lot (initial stages of kidney failure)
  • Decreased urination or not urinating (sign of the kidneys shutting down)
  • Loss of appetite
  • Lethargy, dehydration and bad breath

What to do if my dog ate grapes?

a bunch of purple grapes

If your dog ate grapes, it is usually an emergency situation. Dogs react to grape toxicity in a very individual way – even one grape can make your dog sick, no matter the body weight, age or health status. However, the more grapes a dog has eaten, the more serious it can be. Do not induce vomiting unless you’re instructed to do so. Take your dog to your local veterinarian as soon as possible.



Maven is all about proactive pet care. Be your best friend’s best friend by giving them 24/7, high-quality, industry-leading vet care to improve their mental health, physical health and more. No more frantic googling or unneeded stressful visits to the vet – Maven helps you save hundreds while also ensuring your pet lives the best life possible. Get your kit now!

Leave a Reply

Your email address will not be published. Required fields are marked *