Poor guy. i really thought he'd make it.
I don't want to step on any toes here, but this is the exact reason that I've never supported horse racing, and I never will. He was only 4 years old, baisically a baby, and horse racing screwed up his entire life.
though I do want to say that I think his owners are wonderful because unlike what most race horses's owners would do, they fought to keep him alive. I feel awful for them.