What the Heck Is clinical EMS feed?

https://horse-feed-range349.scriblorax.com/posts/ideal-horse-feed-to-suit-hacking-horses-a-practical-uk-guide

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