Every dog 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 during their golden years. That's why we developed Science Diet Perfect digestive dry dog food with our ActivBiome+ Technology ingredient blend of prebiotics. It's a breakthrough nutrition that supports each dogs unique gut microbiome for healthy digestive and balanced nutrition that helps your dog age 7+ feel their best.