Question 1

How many grapes are toxic to dogs?

Accepted Answer

There is no known safe number. Grape and raisin toxicity is idiosyncratic — some dogs develop kidney failure after just a few grapes, while others show no effect from larger amounts. The lowest documented toxic dose cited by the ASPCA is about 0.3 grams per kilogram of body weight, but because sensitivity varies, any ingestion should be treated as potentially dangerous.

Question 2

Are raisins more dangerous than grapes for dogs?

Accepted Answer

Gram for gram, yes. Raisins, currants, and sultanas are dried, so they concentrate the toxin and a small amount can represent a much larger serving of grapes. Watch for hidden sources like raisin bread, trail mix, granola, and baked goods.

Question 3

What are the signs of grape poisoning in dogs?

Accepted Answer

Vomiting is often the first sign, within a few hours, followed by lethargy, loss of appetite, and reduced or absent urination as the kidneys are affected over the next one to three days. Early treatment gives the best chance of protecting the kidneys.

Question 4

My dog ate grapes or raisins — what should I do?

Accepted Answer

Treat it as urgent regardless of the amount. Call your veterinarian or an animal poison control line such as the ASPCA (888-426-4435) or Pet Poison Helpline (855-764-7661) right away, or go to the nearest open emergency vet. Because toxicity is unpredictable, do not wait to see whether your dog develops symptoms.

Did your dog eat grapes or raisins?