What feeds does my horse need? How much and how often? Is my horse too thin? Or overweight? Feeding your horse in accordance with its nutritional needs will help your horse achieve and maintain its ideal weight and fitness level, as well as contribute to its overall health. A well-nourished horse is less susceptible to infections and the effects of parasites. In this section, basic feedstuffs, water requirements and the use of supplements are described, as well as a method to score your horse’s body condition.