Purina Fortiflora Nutritional Supplement for Cats Six (6) 30-Count Boxes - Purina Pro Plan Veterinary Diets Fortiflora Feline Nutritional Cat Supplement Probiotic supplement for the dietary management of kittens and adult cats with diarrhea FortiFlora is the #1 probiotic brand prescribed by veterinarians Contains a probiotic proven to promote normal intestinal microflora Proprietary microencapsulation process for enhanced stability