Raisins might be a healthy snack for us, but they can pose a real risk to pets — especially dogs. Grapes, raisins, and currants can cause illness even in small amounts, so it’s important for owners to be aware.
This guide walks you through what we know about grape and raisin toxicity, the signs to look out for, and what to do if your pet has eaten grapes or raisins.
Why Are Raisins Dangerous?
The exact substance in grapes, raisins, and currants that causes harm is still unknown. What we do know:
- Dogs are more commonly affected than cats, this is most likely because cats are more selective eaters.
- Toxicity is unpredictable – some pets become seriously ill after just a few raisins, while others may eat more and appear fine.
Because it’s impossible to know how your individual pet will react, any ingestion should be treated as an emergency.
How Much Is Too Much?
There’s no known “safe” amount. Poisoning has been reported with very small quantities — even two or three raisins can make some pets dangerously ill.
Symptoms of Raisin or Grape Poisoning
Signs of toxicity may appear within hours of ingestion, though kidney damage may take up to 72 hours to develop.
Early symptoms include:
- Vomiting (often the first sign)
- Loss of appetite
- Lethargy or unusual tiredness
- Diarrhoea
- Abdominal pain
Later symptoms (as kidney failure develops):
- Increased or decreased thirst
- Changes in urination (increased, decreased, or none)
- Bad breath
- Weakness or wobbliness
- Dehydration
- Collapse or seizures (in severe cases)
👉 Don’t wait for symptoms to appear — early treatment can be lifesaving.
What to Do If Your Pet Eats Raisins or Grapes
Speak to a vet immediately, even if your pet seems fine. Quick action makes all the difference. Try to provide:
- What was eaten
- How much was eaten
- When it was eaten
- Your pet’s weight
How Is Raisin Toxicity Treated?
Treatment depends on the amount eaten and how soon veterinary care is received.
Common treatments include:
- Inducing vomiting (if ingestion was recent)
- Activated charcoal to bind toxins in the stomach
- IV fluids to support kidney function and flush out toxins
- Blood and urine tests to monitor kidney health
- Medications to control nausea, vomiting, and pain
In serious cases, pets may need hospitalisation for several days for intensive monitoring, intravenous therapy, and ongoing treatment to prevent kidney failure.
If treated early — before symptoms develop — most pets recover well with no long-term effects. However, once kidney failure begins, the prognosis is poor and can be life-threatening.
Can Cats Be Affected?
Yes, though it’s less common. Cats are usually more selective in what they eat, but if your cat does eat raisins or grapes, seek veterinary help immediately.
How to Prevent Raisin Toxicity
Prevention tips:
- Keep raisins, grapes, currants, and sultanas out of reach.
- Watch out for hidden sources — baked goods like fruit cake, mince pies, or cereal bars.
- Educate family and guests (especially children) not to share these foods with pets.
- Be extra careful around holidays like Christmas and Easter, when raisin treats are common.
- Store shopping bags securely — curious dogs can easily sneak snacks.
Final Thoughts
Raisin and grape toxicity can be frightening, but awareness and quick action are key. If your pet eats any amount of raisins or grapes, speak to a vet right away — your pet’s safety is always worth the call.
Last updated Nov 2025.
Vet author: Dr Raquel Amils Arnal
Lda Vet PgCertVBM CertAVP TP Ortho MRCVS
Written by a veterinary surgeon in collaboration with PawSquad. Raquel graduated from the University of Barcelona in 2000, and has worked in Spain, Germany and the UK. She has a specific passion for surgery and emergency medicine, currently focusing on telemedicine and OOH service. She spends her free time self-renovating her 1800s home and enjoys the farm life with her husband and their several pets (dogs, cat, goats, horses and chickens).