Are grapes and raisins bad for dogs?

All grapes, raisins, currants and sultanas — as well as foods that contain them such as mince pies, hot cross buns, and fruit cake — can be poisonous to dogs, and potentially poisonous to cats. It’s thought the dried versions of the fruits are more likely to cause severe symptoms and potentially renal failure. But it’s unclear exactly what causes the toxic effects.


My dog ate one grape will he be ok?

A very small number of grapes, raisins, sultanas or currants can cause severe problems in some dogs. Our vets have witnessed emergency cases when just one has been eaten. However, on the other side of the coin, a handful may cause no symptoms.

Unfortunately, in terms of determining just how serious a poisoning case is, there’s no correlation between the amount of fruit eaten and the size of the dog. For this reason, it’s not advisable to feed any grapes or raisins to your pet.  That’s also why we have not created a dog raisin toxicity calculator.

While all forms of grape are poisonous to dogs, extra caution should be taken with foods containing raisins, currants (dried fruit of dark grapes) and sultanas (dried fruit of white grapes) as these have been associated with more severe cases.

Image of a dog about to eat mince pies for Vets Now article on mince pies and dogs, answering the question 'can dogs eat grapes?'

What to do if your dog eats grapes

After removing the source of the grapes, raisins, sultanas or currants, call your vet or, out of hours, your nearest Vets Now as they will be in the best position to offer advice. It’s likely your vet will ask you to bring your dog into the clinic. If this is the case take a sample of whatever they’ve eaten or, if possible, the wrapper or box the food containing the fruits came in. Do not try to give your dog salt water or induce vomiting.

Signs of grape or raisin poisoning

Normally symptoms start showing between six and 12 hours after your dog has eaten grapes or raisins, with liver failure developing within 24 to 72 hours of exposure. But these may not take effect for several days. In the most serious cases, the fruits can also cause sudden kidney failure.

Things to look out for include vomiting and diarrhoea (possibly with blood present), abnormal drinking or urination, increased drooling and a lack of appetite. Other signs include weakness or wobliness when walking, lethargy and blood in your dog’s urine.

Common questions on can dogs eat grapes — click to open

Why are grapes bad for dogs?

Ingestion of the fruits of Vitis Vinifera (grapes, raisins, sultanas and currants) is a common intoxication in dogs and can lead to acute renal failure and death. However, it’s not clear exactly which substance or chemical in these fruits causes this poisoning.

How to make a dog vomit after eating grapes?

Vets will often induce vomiting in dogs who have eaten something toxic. This is because it’s usually the simplest way to clear out their system. But dog owners should never attempt to make their dogs sick themselves without consulting with a vet. In some cases, inducing sickness can be dangerous.

Why do some people think it’s a myth grapes are bad for dogs?

One of the reasons for this is some dogs can eat several grapes and suffer no ill-effects while others become ill after only eating one or two. In addition to this, no specific chemical in grapes has ever been isolated as being poisonous to dogs. However, a study by our own emergency vets into grape and raisin poisoning in dogs revealed that, of 606 cases presenting to our emergency clinics, one in eight (12%) presented with clinical signs such as vomiting or diarrhoea.

My dog ate grapes but seems fine, what should I do?

Monitor your dog closely for up to 24 hours after ingestion. If they show any of the symptoms listed below, contact your vet or, out of hours, your nearest Vets Now pet emergency clinic or 24/7 hospital.

  • Vomiting or diarrhoea
  • Rapid breathing
  • Restlessness or hyperactivity
  • Tremors or incoordination
  • Increased heart rate
  • Seizures
Image of a dog for Vets Now article on dog ate raisins and are grapes poisonous to dogs

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What's the prognosis for grape and raisin poisoning?

Dogs treated for grape and raisin toxicity generally have a very high chance of survival if treatment is prompt and early and there’s been no kidney damage. However, if treatment is delayed and there are signs of kidney failure your dog may suffer lifelong health issues or, in the most severe cases, lose their life.

How will my vet treat grape or raisin toxicity?

There’s no direct antidote for grape or raisin toxicity so the key to a successful outcome is early treatment. Your vet may administer a drug to make your dog sick or give them a treatment called activated charcoal which helps to clear away toxins left in the intestines. Typically, the vet will also check their kidney enzymes for any damage.

If it’s too late to make your dog sick, or tests indicate kidney damage, then more intensive treatment will be required.  Your dog may require intravenous fluids (a drip) as well as medication to help with nausea and acute kidney damage.  An ultrasound scan to look at the kidneys may also be required.

How to prevent poisoning from grapes or raisins

The simplest advice is to be aware of any products containing grapes, raisins, sultanas and currants and to store foods containing these ingredients well out of reach of your dog. If you’re baking at home, particularly with young children, handle potentially toxic ingredients with care and do not leave children alone with your dogs in the kitchen. Our emergency vets have treated scores of dogs who have eaten entire packets of dried fruit straight from shopping bags, so be sure to put your shopping away as soon as you get home.