No. Dogs must never eat grapes, and the same goes for raisins, sultanas and currants. These fruits are toxic to dogs and can cause sudden, life-threatening acute kidney failure. There is no known safe amount: some dogs eat a lot and seem fine, while others become seriously ill after just a few. Because you can't predict which dog will react, the only safe rule is zero.
If your dog has eaten grapes or any dried-vine fruit, treat it as an emergency and contact your vet straight away. Don't wait to see if symptoms appear. This is the one fruit post in our series that isn't about "moderation." It's a straight warning.
Why grapes and raisins are so dangerous
Grapes, raisins, sultanas and currants can all trigger acute kidney failure in dogs. The exact toxin isn't fully understood, but the danger is very real and well documented: the PDSA has a dedicated page on grape, raisin, currant and sultana poisoning in dogs.
What makes it especially worrying:
- There's no known safe amount: even a small quantity can harm some dogs.
- The reaction is unpredictable: sensitivity varies enormously from dog to dog, regardless of breed or size.
- Dried versions (raisins, sultanas, currants) are concentrated, so they can be just as dangerous, or worse, than fresh grapes.
Because you can never know how your individual dog will respond, you should always assume the worst and act quickly.
> Vet note: If your dog eats grapes, raisins, sultanas or currants, phone your vet or out-of-hours emergency vet immediately. Don't wait for symptoms. You can also call the Animal PoisonLine on 01202 509000 (a paid UK service) for advice on whether you need a vet. Do NOT try to make your dog sick unless a vet specifically tells you to.
Hidden sources: the ones that catch people out
Most owners know not to hand over a bunch of grapes. The real danger is the dried fruit baked into everyday foods, often without a second thought. The Blue Cross list of foods poisonous to dogs flags grapes and raisins for exactly this reason. Watch out for:
- Mince pies (especially around Christmas)
- Hot cross buns (especially around Easter)
- Malt loaf and fruit loaf
- Fruit cake, Christmas cake and Christmas pudding
- Trail mix and cereal / breakfast bars
- Scones, teacakes, Garibaldi biscuits and Eccles cakes
- Some breakfast cereals and granola
Keep all of these well out of reach, off worktops, out of bags on the floor, and away from the coffee table. Dogs are experts at helping themselves.
Signs to watch for
If a dog has eaten grapes or dried vine fruit, symptoms can appear within hours. Look out for:
- Vomiting (often the first sign) or diarrhoea
- Lethargy or weakness
- Loss of appetite
- Increased or decreased thirst
- Reduced or no urination (a warning sign of kidney trouble)
- Belly pain or a hunched posture
But, and this is the important part, don't wait for symptoms to show. By the time signs of kidney damage appear, it may be harder to treat. Early veterinary care gives the best chance of a good outcome.
What to do if your dog eats grapes or raisins
- Stay calm and act quickly. The sooner you get advice, the better.
- Call your vet or emergency vet immediately, or the Animal PoisonLine (01202 509000).
- Tell them what and how much was eaten, and when, if you can.
- Don't induce vomiting unless a vet tells you to.
- Follow their instructions. They may want to see your dog right away.
This is the big exception to our fruit series. Strawberries, apples and blueberries can all be enjoyed safely in moderation, but grapes and their dried relatives are in a category of their own. When in doubt, leave them out.
Frequently asked questions
Can dogs eat grapes at all, even one?
No. There is no known safe amount. Some dogs react to just a few grapes, so you should never feed grapes, raisins, sultanas or currants, and treat any accidental ingestion as an emergency.
Are raisins as dangerous as grapes for dogs?
Yes, if anything more so. Raisins, sultanas and currants are concentrated dried grapes, so they carry the same risk of kidney failure in a smaller package. Watch for them in baked goods.
My dog ate a grape, what should I do?
Call your vet or the Animal PoisonLine (01202 509000) straight away. Don't wait for symptoms and don't make your dog sick unless a vet instructs you to.
What are the signs of grape poisoning in dogs?
Vomiting, diarrhoea, lethargy, loss of appetite, changes in thirst and reduced urination. Because kidney signs can appear late, always seek advice immediately rather than watching and waiting.
This is general guidance, not veterinary advice. Grape and raisin toxicity is a genuine emergency. Always contact your own vet or an emergency vet right away.
This isn't veterinary advice
One important note before you go: we're professional dog groomers, not qualified veterinary or medical professionals, so nothing in this article is medical or veterinary advice. It's general information to help you feel a little more informed. No more than that. If you're at all worried about your dog, or before you act on anything you've read here, please speak to your local vet. They know your dog and can give you proper advice and support. And in an emergency, contact your vet or nearest out-of-hours clinic straight away.
Fluffs is a professional dog grooming salon in Wigginton, York, offering one-to-one grooming for dogs of every breed and coat type across Haxby, Strensall, Huntington, New Earswick and the surrounding villages. Keeping your dog happy, healthy and safe matters to us as much as it does to you. Book their next groom.