Grape poisoning in dogs is a veterinary emergency that is often underestimated. Grapes and raisins can cause acute kidney failure in dogs, even when consumed in small amounts. Unfortunately, the exact toxic dose remains unknown, and some dogs may develop severe symptoms after eating just a few grapes, while others may show no signs at all. Regardless of the amount, any ingestion should be treated as an emergency—prompt veterinary care is essential.

Why are grapes toxic to dogs?

Grapes contain an as-yet unidentified substance that damages the kidneys in dogs. Unlike other types of food poisoning, grape toxicity does not consistently depend on the dog’s weight or the number of grapes eaten. This unpredictability makes any ingestion of grapes potentially dangerous.

⚠️ Because every dog reacts differently, even a few grapes can cause life-threatening issues in some animals.

What are the symptoms of grape poisoning in dogs?

Symptoms usually appear within a few hours after ingestion. Early signs may include:

• Repeated vomiting
• Loss of appetite (anorexia)
• Lethargy and overall weakness
• Diarrhea
• Abdominal pain

If untreated, the condition can rapidly progress to acute kidney failure, characterized by:

• Decreased or absent urine production
• Severe systemic illness that can be fatal

How is grape poisoning treated in dogs?

Treatment success depends on how quickly veterinary care is initiated:

• If ingestion was recent:
  • Induction of vomiting by the veterinarian
  • Administration of activated charcoal to reduce toxin absorption
• If kidney damage has begun:
  • Hospitalization with intravenous fluids to support kidney function
  • Close monitoring of kidney parameters through regular blood tests
  • Supportive care depending on the severity of the symptoms

Fast intervention significantly increases the chances of recovery.

Prevention: how to protect your dog from grape poisoning

To prevent grape poisoning in dogs:

• Keep grapes and raisins out of your dog’s reach
• Check the ingredient lists of processed foods (breads, cookies, snack bars)
• Inform family members and visitors about the risks of grapes and raisins for dogs
• Always contact a veterinarian immediately if you suspect your dog has ingested grapes or raisins

Prevention and rapid action are key to protecting your pet’s health.