The general purpose supplement refill 2 kg from NAF is a broad spectrum vitamin and mineral supplement formulated for the horse or pony in light-to-moderate work. A high fibre diet is natural to the horse, mimicking the continual grazing that his gut evolved to thrive on. Fibre provides slow release energy, ideal for maintaining condition. For this reason, many leisure horses will receive adequate energy for work and to maintain condition from grazing and forage alone. However, fibre alone is unlikely to provide all the micro-nutrients required for health and vitality.