Before attempting to rehydrate your dog, it's critical that your dog be seen by a veterinarian, as dehydration can lead to further consequences, including multiple organ failure, stroke and death. Only until after you have been to a veterinarian, would we recommend you attempt to rehydrate your dog on your own. Offer your dog small sips of water or a piece of ice to lick. If vomiting has subsided, use electrolyte-enhanced water to restore hydration and nutrients they may have lost. Discuss treatment with your veterinarian to ensure the proper dosage and treatment for your pup.