Even the smallest dogs have entire ecosystems 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 help support not only their digestive health, but their overall well-being. That's why we developed Science Diet Perfect Digestion dry dog food with our ActivBiome+ Technology ingredient blend of prebiotics for small and mini dogs. It's a breakthrough nutrition that supports each dog's unique gut microbiome for healthy digestion and balanced nutrition that helps your dog feel their best.