see here: 10 Things I Wish I'd Known Earlier

https://horse-feed-basics002.fotosdefrases.com/what-nutrients-should-horses-get-in-their-feed

Nutrient-balanced horse feed for ponies promotes proper weight management, consistent energy, and smooth digestion. Formulated with high-fiber ingredients, vitamins, and minerals, it aids in maintain sound hooves, a glossy coat, and total pony health.