PreBiotics, another breakthrough from Iams, are now in every can of Iams ProActive Health cat food, including Iams ProActive Health Adult Filets with Chicken in Gravy Canned Cat Food. Feeding a diet with PreBiotics helps promote good bacteria to aid in digestive health and support a cat?s defenses. Iams ProActive Health Adult Filets with Chicken in Gravy Canned Cat Food will bring out your cat"s best, and this delicious chicken and gravy formula will leave your cat craving for more.