Grapes can be incredibly poisonous but they can also be completely harmless…so when should you worry?A single grape will be absolutely fine for a dog of this sizeI have a raisin and grape toxicity calculator to help you know when there could be a problem in the futureThere is a lot of uncertainty about grape poisoning because the actual toxin is unknown and there is a lot of variation in individual dog sensitivityIf you have a question where emergency treatment might be needed, it is always best to contact your veterinarian or emergency service straight away so that, if treatment is needed, it won't be too late.Head over to the full show notes, and download your free guide to keeping your pet as happy and healthy as possible