- Based on these observations, toxicity seems to be due to a lower expression of OAT4 in dogs. 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.
For this reason, any ingestion should be treated as potentially toxic. While some dogs do not show clinical signs early on, signs will often appear within 6-24 hours after ingestion and may include: ... Even a few grapes or raisins can be dangerous for some dogs, so acting quickly is imperative. Dont wait for symptoms to appear.
- Since there are still many unknowns associated with this poisoning, it is better not to take any risks when it comes to your dogs health. As with any toxin, the sooner the poisoning is diagnosed and treated, the less dangerous it will be for your pet, and the less expensive treatment will be for you in the long run. ... The most common early symptom of grape or raisin toxicity is vomiting, which is generally seen within 24 hours following ingestion.

- After ingesting grapes or raisins, symptoms of poisoning can manifest within 24 hours. As a dog owner, it's imperative to be vigilant and recognize these signs promptly: Vomiting: This is often the earliest and most common sign.
- Most signs of grape toxicity (i.e. kidney injury) can be delayed for 1-3 days and can be subtle at first, though sometimes dogs will vomit within a few hours. ... Symptoms can sometimes appear within a few hours of ingestion but often signs are delayed 24 to 48 hours.

The ingestion of grapes or raisins has been reported to cause acute kidney injury (AKI) in dogs, with a clinical picture dominated by early gastrointestinal signs and rapidly developing uremia. Ataxia is mentioned in a few reports, but not further ...