Look at this website: Expectations vs. Reality

https://apnews.com/press-release/getnews/press-release-0fff0502116b0f831b4ccb2fd26024e4

Specialized horse feed for metabolism-sensitive horses promotes steady glucose control, reduced-starch nutrition, and stable energy. Ideal for insulin resistance, Equine Metabolic Syndrome, and easy keeping horses needing a well-rounded, low-sugar diet.