Opta Gest Digestive Aid by In Clover is a complete all-natural supplement for digestive health in dogs. Digestive enzymes are easily destroyed by the normal processing of commercial pet food. External conditions such as travel, separation, storms, diet change, etc., can cause anxiety or stress that may reduce digestive efficiency. Also, as the body ages, fewer enzymes are produced. OptaGest replenishes the enzymes that help process fats, carbohydrates and protein, easing the burden placed on the digestive system. The prebiotic, FOS, feeds the native bacteria that naturally replenish these essential enzymes.