Many cases of feline diarrhea are not serious or long lasting. They usually react quite well to simple treatment and home care, in other instances, however, diarrhea can be part of a more compound medical picture. Fluid loss from diarrhea of any cause, particularly when accompanied by vomiting, can rapidly lead to dehydration and very serious health consequences. This is principally true in kittens and senior cats. Constant disorders of the small intestine classically cause weight loss and malnutrition as time progresses. Some forms of severe diarrhea can be life-threatening and necessitate aggressive intervention. These include feline distemper, intestinal obstruction and intoxications.
In the milder cases, changing back to the old food for a few days can solve the problem. Or else, try feeding tiny, recurrent meals of simple, easily-digested food like low-fat chicken or beef, which can be easily pureed in a blender with water or chicken broth to yield a good consistency. Try adding a probiotic such as lactobacillus, the “good bacteria” found in yogurt. Fortiflora is an excellent source of live, active probiotic cultures. Unflavored canned pumpkin, which is loaded with fiber, is a wonderful way to firm up stools and has a taste that many cats like. One to two level tablespoons per 5.5 oz can of cat food is a great starting dose. Continue using this diet until two days past the resolution of diarrhea. Then gradually reintroduce a healthy maintenance diet over the next few days, taking especial care to avoid any pet foods or treats that may have triggered the problem in the first place.
Never give any medications, and that includes over-the-counter human medications, to your cat unless under stringent instructions by your veterinarian. Common over-the-counter remedies such as Imodium and Pepto Bismol can be toxic for your cat