High amounts of energy are necessary for mares to take care of the foals and for young horses to grow. Energy comes from fats or carbohydrates (sugar & starch). In muesli, energy is mainly from the fat but practically it’s difficult to get such high levels of fat in pellets. Therefore, the energy must come from sugar & starch (by grains). As a lot of energy is used by the horses, and the sugar and starch in the pellets is very well digested, we do not consider this as negative.