The Evolution of fibre-based horse feed

https://equine-nutrition756.lumenforgex.com/posts/what-should-i-feed-my-horse-horse-feed-guide-and-quiz

Horse feed bran is a fiber-rich addition to equine rations, helping support good digestion and steady condition. Ideal for blending with oats, chaff and mineral supplements, it delivers a tasty feed option for horses and ponies.