Are Grapes and Raisins Toxic to Dogs?
Grapes, raisins, sultanas, and currants are highly toxic to dogs and can cause acute kidney failure. The exact toxic substance has not been definitively identified, though tartaric acid is suspected.
What Makes Grapes & Raisins Dangerous to Dogs?
Grapes, raisins, sultanas, and currants are highly toxic to dogs and can cause acute kidney failure. The exact toxic substance has not been definitively identified, though tartaric acid is suspected. There is no safe dose — even a single grape has caused kidney failure in some dogs. Individual sensitivity varies widely, making any ingestion a potential emergency.
Toxic Agent
Unknown compound (tartaric acid suspected)
Common Sources
- •Fresh grapes (red, green, seedless, or seeded)
- •Raisins, sultanas, and dried currants
- •Trail mix, granola, and baked goods with raisins
- •Grape juice, wine, and grape jelly
- •Fruitcakes and raisin bread
Symptoms of Grapes & Raisins Poisoning in Dogs
Mild Symptoms
- ▸Vomiting (usually within 6-12 hours)
- ▸Loss of appetite and lethargy
- ▸Abdominal pain and tenderness
Moderate Symptoms
- ▸Diarrhea
- ▸Decreased urine output (oliguria)
- ▸Dehydration and excessive thirst
Severe / Emergency
- ▸Complete kidney failure (anuria)
- ▸Seizures and tremors
- ▸Coma and death
What to Do If Your Dog Is Exposed to Grapes & Raisins
- 1
Remove any remaining grapes or raisins from your dog's reach.
- 2
Do NOT wait for symptoms — grape toxicity can be delayed 24-72 hours.
- 3
Note the approximate amount ingested and time.
- 4
Use VetGeni's free toxin checker for an immediate risk assessment.
- 5
Contact your veterinarian or emergency clinic immediately.
When to See the Vet
Any grape or raisin ingestion in dogs should be treated as an emergency. There is no established safe dose. Seek veterinary care immediately regardless of the amount eaten.
Prognosis
Good if treated within 2 hours with decontamination (induced vomiting and activated charcoal). Once kidney failure develops (typically 24-72 hours post-ingestion), prognosis becomes guarded to poor.
Check Grapes & Raisins Toxicity for Your Pet
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- Substance and estimated amount
- Pet weight and species
- Time since ingestion
- Current symptoms, if any
Frequently Asked Questions
- How many grapes are toxic to a dog?
- There is no established safe number. Some dogs have developed kidney failure from a single grape, while others have eaten larger quantities without apparent effects. Because individual sensitivity is unpredictable, any ingestion should be treated as potentially dangerous.
- Are raisins more toxic than grapes to dogs?
- Yes, raisins are considered more dangerous on a weight-for-weight basis because they are concentrated — a raisin contains the same toxin as a fresh grape but in a smaller, more concentrated form. Dogs are more likely to eat multiple raisins before an owner notices.
- Can a single grape kill a dog?
- While rare, single-grape fatalities have been documented, particularly in small dogs. The unpredictable individual sensitivity makes it impossible to say any amount is safe. Always treat grape ingestion as an emergency.
Related Pet Toxins
Emergency? Call Poison Control
If your pet is showing severe symptoms, call immediately:
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Reviewed by Dr. Christopher Tiller, DVM — Emergency Veterinarian & VetGeni Founder. This information is for educational purposes and does not replace professional veterinary care. Always consult a veterinarian for specific medical advice.