What the Heck Is reduced energy horse feed?

https://horse-nutrition428.lucialpiazzale.com/what-horse-feed-is-best-for-competition-horses-1

Gentle horse feed for sensitive stomachs, designed to support comfortable digestion, hindgut health and better nutrient absorption. A low-starch high-fibre formula with naturally sourced ingredients to help maintain calm digestion and overall wellbeing.