Good for both diarrhea and constipation, canned pumpkin (not raw, not the sugary, spicy pie filling) is loaded with fiber and beta-carotene, which the body converts to vitamin A. Don’t give Buddy a lot of it—too much A is highly toxic to dogs—but a couple of teaspoons a day for little pups, or a couple of tablespoons for big boys, should keep them right on track. read more