People tend to buy the cheapest feed, but then add a lot of supplements. Like Ainsworth, she will feed supplements if the owner provides them, but won't allow any boarding discounts if the owner provides the feed. Feeding a supplement to correct the situation is usually the better option. Most barn managers will acknowledge the difference in horses and accommodate their customers. For horses who are too thin, look at possible reasons such as deworming schedules, pasture time and amount of grain and hay fed.
Rice bran works well to solve underweight problems.
Stabilized rice bran is an all-natural supplement that provides extra calories in the form of fat. Do not confuse rice bran with wheat bran. Rice bran contains 20 percent fat and naturally high levels of Vitamin E and iron. Feed one to two pounds per day for optimum weight gain and the side benefit of improved coat condition. Thin horses often do not get enough good fiber in their diets.