The formula contains OPTIDIGEST, a special combination of nutrients that support the digestive system. These include highly digestible ingredients (such as egg) that ease the digestive process, and bentonite (a natural clay) that promotes good stool quality.After digestive discomfort, dogs often associate the experience with the particular taste of the food they ate. This can lead to long-term aversion to a certain flavour. To help with this, the diet is available in a choice of flavours: chicken and lamb.