What the Heck Is metabolic support horse feed?

http://www.kansasnewsheadlines.com/news/story/582403/with-half-of-britains-horses-overweight-bifid-launches-grainfree-lowsugar-feed-for-the-nations-gooddoers.html

Gentle horse feed for sensitive stomachs, designed to support gut comfort, intestinal health and easy nutrient absorption. A low-starch fiber-rich formula with naturally sourced ingredients to help maintain steady digestion and overall wellbeing.