So, can dogs have grape juice? Absolutely not! Grape juice is extremely toxic for dogs – even more so than some other substances like chocolate that are famous as dangerous to dogs.
The lowest recorded amount of grape juice to lead to immediate kidney failure is 0.3 ounces per pound of body weight. For raisins, the quantity is 0.05 ounces per pound of body weight.
Call your vet immediately if your dog has ingested grape juice, grapes, or raisins. By describing to your vet the specific symptoms your dog is experiencing, he or she will instruct you how to proceed.