What the Heck Is feed for overweight horses?

https://horse-feed-range929.novacrestiq.com/posts/horse-feed-with-vitamins-and-minerals-a-practical-guide

Gentle horse feed for sensitive stomachs, designed to support comfortable digestion, intestinal health and easy nutrient absorption. A reduced-starch fiber-rich formula with natural components to help maintain calm digestion and overall wellbeing.