5 Things Everyone Gets Wrong About soy free senior horse feed
https://sites.google.com/view/muscle-building-feed-for-horse/
Workload sets the dose: light work gets 30–50 g per 220 lb of body weight, medium 50–80 g, heavy 80–100 g. That gram-range feeding suits sport horses in regular training, at $52.99 for the 44 lb bag within a complete ration.