Plus digestive enzymes for advanced digestive support. Essential nutrients. No fillers. Natural flavor. Precisely formulated to support a senior dog's digestive health - with MOS fiber + digestive enzymes; immunity - with antioxidant vitamins C & E; heart & eye health - with taurine. Senior Dog Formula: Small & medium breeds for ages 7 & up. Large breeds (100+ lb) for ages 5 & up. Made in USA.