A lot of keeps that I know from active participants still use rice in their keeps, but what they got away from simply was the carb loading as the science for so many years was thought that the dog's body used carbs the same as a human's body. I can see how that would be true for something like a greyhound for it's chosen profession, so to speak. I use rice, and I also use the maltodextrin immediately after work as he suggests.