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Why are grapes bad for dogs?

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Dogs of any age, breed, or gender may be affected. Grapes and raisins are bad for dogs because one of the most serious complications of grape/raisin toxicity is they can cause severe kidney damage leading to acute (sudden) kidney failure with lack of urine production (anuria). read more

Eating a significant quantity of grapes (32 g of grapes per kg of dog) can potentially be fatal to dogs, though not to all dogs. About 2/3 of dogs are unaffected by grapes according to a study done by the Animal Poison Control Center. read more

Vomiting and diarrhea are often the first clinical signs of grape or raisin toxicity. They often develop within a few hours of ingestion. Pieces of grapes or raisins may be present in the vomitus or stool. Further symptoms include weakness, not eating, increased drinking, and abdominal pain. Acute renal failure develops within 48 hours of ingestion. read more

As to why grapes and raisins are bad for some dogs, generically speaking it’s because grapes and raisins can cause rapid renal failure (kidney failure). The exact mechanism behind the kidney failure after consumption of grapes or raisins isn’t known. read more

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