Dogs should not eat sultanas because they are highly toxic to them and can cause severe health problems, including acute kidney failure. The toxic substance in sultanas (and grapes, raisins) is unknown, and even small amounts may be dangerous to some dogs, although others may not show a reaction. If a dog has eaten sultanas, it is important to contact a veterinarian immediately for advice and possible treatment, which may include inducing vomiting or dialysis in severe cases. It is safest to keep sultanas and similar fruits away from dogs entirely.
