Hill's Science Diet Adult Perfect Digestion Chicken, Barley, & Whole Oats Recipe Dry Cat Food, 3.5 lb bagProduct Information Every cat has an entire ecosystem living within them the gut microbiome, full of billions of desirable and undesirable bacteria unique to your pet. With the right nutrients to help balance their microbiome, you can actually affect not only their digestive health, but their overall well being. Thats why we developed Science Diet Perfect Digestion dry cat food with our ActivBiome+ Technology ingredient blend of prebiotics. Its a