racehorse performance feed: 10 Things I Wish I'd Known Earlier

https://horse-feed-advice795.tearosediner.net/hoveler-western-sport-vs-a-high-starch-feed-9-differences-your-horse-will-feel-1

Feeding a hard keeper starts with the stated rates: 0.88 lb per 220 lb of body weight for medium work, and then adjusted to condition and training intensity as the guide advises