You know. I have been in the professional game for too many years.... I have had to revise my ideas on proper feeding techniques many times over the years. It is foolish to think that, as a "big time" professional, I know it all. I depended on barn professionals to keep up with the upgrades information over the years. Even so, I had to learn new information about equine nutrition all of the time. To rely on the same info I knew for over 40 years is a serious, and dangerous, problem.
Equine nutrition is something that has been studied and researched extensively over the years. It is the responsibility of ALL horsepeople to stay up with the research and feed appropriately, IMHO.
I know I have changed how I've done things several times over the years as new research has uncovered problems.
Creep feed sweet feed mixes to foals....not with today's knowledge.