NAF Five Star Optimum Feed Balancer 3kg. The NAF Five Star Optimum Feed Balancer is designed to compliment and optimise your horse's diet, whether your horse is a happy hacker or performance horse. NAF Five Star Optimum maximises the nutritional value of your horses's daily feed, whilst ensuring the health and efficiency of your horse's digestive system. Optimum also restores and maintains the condition and health of your horse due to it's highly concentrated supplement formula and fantastic sugar free taste. Optimum is very palatable and is designed to compliment any horse's diet, it can also be fed on it's own when feeding is not necessary.