In the past 10 years, the addition of fat to the horse diet has been researched extensively. The overwhelming conclusion has been that it is beneficially. Horses can't colic on it, it's the most concentrated source of calories, it's highly utilized (they don't waste it in the digestion process), it's inexpensive and it will enhance performance (muscles can be trained to utilize fat as an energy source that lasts longer than glycogen). Horses digest all types of fat equally, soy, corn, veg, ricebran... Where the difference lies is in the amount of omega 3 and 6 fatty acids but that's not the question here. To me it just sounds like someone has something to sell.