An OTTB needs a proper diet. In addition to normal hay and fresh grass on the pasture the best food for an OTTB horse include grain free complete feeds, lupins, sugarbeet pulp, soybean or lupin hulls, full-fat soybean, and copra. Lupins are high in fiber, are easy to digest, and help keep a horse's coat shiny and soft. The horse will enjoy this nutritious food. It is also beneficial for the digestive tract. A good quality mineral block is also essential to support the digestive system and ensure optimal nutrient absorption.  While this kind of diet will help your horse to get through the early stages of transformation from a racehorse to an "ordinary" horse it will also help to adopt more relaxed attitude, which can be very beneficial if you are just starting to train him.