Grape and Raisin Toxicity in Dogs

Grapes and raisins can cause sudden kidney injury in some dogs, though the exact substance responsible and why only certain dogs are affected remains unclear. The reaction, when it occurs, typically begins within hours of ingestion and can progress quickly. Not every dog that eats grapes will become ill, but there is currently no way to predict which individuals will react. Owners most often arrive at this page after discovering their dog has eaten grapes, raisins, or foods containing them—perhaps from a fruit bowl, a dropped snack, or baked goods. Early signs, when present, may include vomiting, reduced appetite, quiet behaviour, or changes in thirst and urination. Some dogs show no outward signs at all in the first hours. This page explores the patterns that may suggest exposure or early kidney involvement, what is understood about how the injury develops, the investigations that help assess kidney function, and the range of approaches used to limit absorption, support the kidneys, and monitor recovery. The goal is to help you understand what may be unfolding and what shape the veterinary response typically takes.