When your dog has an upset stomach you can give the dog some Pepto Bismol if the dog will take it and it will relieve the dogs upset stomach.
You can also add a tablespoon of plain, unsweetened yogurt to the dogs food which can help settles the dogs upset stomach.
Other things that can be added to the dogs food to settle the dogs upset stomach are Pumpkin, oatmeal, sweet potatoes, and bananas.
Or you can also give them some other over the counter medicines for settling upset stomachs in dogs.