Hill's Science Diet Adult Perfect Digestion Salmon Dry Dog FoodProduct Information Every dog has an entire ecosystem living within them the gut microbiome, full of billions of diverse microbes 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 dog food with our ActivBiome+ Technology ingredient blend of prebiotics. Its a breakthrough nutrition