Plain, skinless, and boneless boiled chicken is a bland source of protein that can be gentle on your dog's stomach.
White rice is another easily digestible option. It can help firm up loose stools and provide a source of carbohydrates for energy.
Canned or pureed pumpkin (not pumpkin pie filling) can help regulate your dog's digestion due to its fiber content. It can be particularly helpful for diarrhea.
Unsweetened, plain yogurt with live active cultures can provide beneficial probiotics that aid in digestion and help restore the balance of gut bacteria.
Plain, boiled potatoes without any seasoning or additives can be a good source of carbohydrates for dogs with upset stomachs.
Cooked plain oatmeal can be another soothing and easy-to-digest option. Ensure it's free from added sugars or flavorings.
Homemade or store-bought unsalted, low-sodium bone broth can provide hydration and essential nutrients while being gentle on the stomach.
A very diluted and cooled-down peppermint tea can help ease nausea and settle the stomach. Make sure it's caffeine-free and contains no added sweeteners.