Horse training for racing is fascinating.
Yes it is, before they were trained for racing, they were trained for warfare. 
That is understandable, but a shame.    Beautiful animals.
Some horses are trained for specialized jobs for movies and circus entertainment. Not sure how great of a life for that kind of a horse is. 
True, but better than being shot!
Thats true, some of the cowboys that work for the circus probably were into ranch work and working with horses that way first. 
I like Stallions the best.
Yeah I think thats the kind they race because their seamen is worth a lot of money if they win.