One of the most common ailments we hear about with dogs is diarrhea. The condition can result from a number of different things, from garbage, to parasites, to infectious agents such as parvovirus. Most causes of diarrhea respond to symptomatic treatment.
My most effective recommendation for treatment is a 24 hour fast. If you stop putting food into your pet for 24 hours it allows the intestines a chance to rest and regenerate. Because of possible dehydration you need to always have plenty of water available. After 24 hours then introduce a bland diet for the next 24 hours. You can use plain white cooked rice for dogs.
For cats- protein is essential so try cooked chicken breast with the rice. The next day mix the bland diet 50/50 with their regular diet. By the end of the third day they should be back to normal.
posted by Rob Mueller