The Most Common Complaints About horse feed for weight gain, and Why They're Bunk

https://www.cortlandstandard.com/online_features/press_releases/in-the-home-of-endurance-racing-bifid-brings-grain-free-gut-first-feed-to-the/article_625cdda5-69a8-5be1-af7e-96b014cec976.html

Horse feed supplements for muscle development lean body condition, topline development, and faster recovery in athletic horses