Every cat has an entire ecosystem living within them — the gut microbiome, full of billions of desirable and undesirable bacteria unique to a pet. With the right nutrients to help balance their microbiome, you can actually affect not only their digestive health, but their overall well-being. That’s why we developed Hill's Science Diet Adult Perfect Digestion Chicken & Barley Recipe dry cat food with ActivBiome+ Digestion. It’s a breakthrough nutrition that supports each cat’s unique gut microbiome for healthy digestion and balanced nutrition that helps cats feel their best.