Vetsupply: A dog\'s gut has an entire set of beneficial and non-beneficial bacteria that compose a microbiome. The gut microbiome not only influences digestive health but also the overall health of your Fido. Hill\'s Science Diet Adult 7+ Perfect Digestion Recipe is a delicious food that has the right nutrients like prebiotics that feed the billions of bacteria that are beneficial for good health. It is a breakthrough blend of Activbiome+ and prebiotics that supports each 7+ age pet\'s microbiome for healthy digestion and overall wellbeing.