The Worst Advice You Could Ever Get About feed for overweight horses

https://balanced-horse-feed827.cavandoragh.org/what-is-the-top-high-fibre-horse-feed

Horse feed without oats offers reduced-starch nutrition for horses with delicate digestion, a need to manage weight, or a calmer disposition. It contains fiber-rich ingredients like beet pulp, alfalfa and balancer pellets for a balanced grain-free diet.