Question: dog has an upset stomach what to do?
Answer: Add a tablespoon of plain, unsweetened yogurt to the food. ... 
Keeping your dog on a daily probiotic like yogurt or FortiFlora can help minimize digestive episodes.
Pumpkin, oatmeal, sweet potatoes, and bananas can also be added to help settle the stomach.
Yes, you can use over-the-counter medicines for your dog!