What the Heck Is low sugar competition feed?

https://horse-feed-brands117.tearosediner.net/what-horse-feed-should-i-use-if-my-horse-lives-out

Gentle horse feed for sensitive stomachs, designed to support comfortable digestion, hind gut health and better nutrient absorption. A reduced-starch high-fibre formula with natural ingredients to help maintain steady digestion and overall wellbeing.