Beet pulp, which has about 1,000 calories per pound, can be used to assist underweight horses in gaining weight (a quart of dried beet shreds is approximately 0.5-0.6 pounds in weight). Beet pulp is an excellent supplement to an equine's diet if they need to expend many calories or gain weight.  As beet pulp is readily digested, the horse has much less gut fill and may take a little more every day, allowing for increased feed and calorie consumption, which supports the weight gain idea that many horse owners look forward to.