Not an expert on horses, but...why are they racing a horse whose hoof looks like that?
Just looks bad...tell me if I’m wrong...
I don't know a lot about horses, other than their hooves are their Achilles' heels, so to speak. Underneath is a soft part that is very delicate. If a horse founders, the fever that accompanies the foundering damages the internals of the hoof. There is a bone in the middle of the hoof (called the "coffin bone," for reasons that will become obvious) that will slide down and puncture the soft part of the foot, causing the horse to go lame. There is nothing that can be done, at this point, other than put the animal down.
The only thing about horses I know for sure is that you should never purchase a horse that has survived foundering.
In case you don't know, if a horse breaks into a grain bin, it will eat until it literally cannot eat any more. It's stomach contents become so compacted that the horse will die without mechanical intervention to relieve the constipation.