Hill's Prescription Diet k/d Dry Dog Food with ActivBiome+ Kidney Defense is specially formulated by nutritionists and veterinarians to help manage chronic kidney disease, or CKD. A proprietary blend of prebiotics activates the gut microbiome to help reduce uremic toxins and slow down the progression of the disease. The thoughtful recipe also includes Hill's Enhanced Appetite Trigger to stimulate your dog's appetite and encourage healthy eating. In addition to high levels of essential amino acids and L-carnitine, increasing caloric intake can support your dog's natural ability to build muscle mass. This dry food is made with real chicken and has an irresistible taste that dogs love.