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.
Stallion
A stallion is a male horse that has not been gelded (castrated).
Stallions follow the conformation and phenotype of their breed, but within that standard, the presence of hormones such as testosterone may give stallions a thicker, "cresty" neck, as well as a somewhat more muscular physique as compared to female horses, known as mares, and castrated males, called geldings.
Temperament varies widely based on genetics, and training, but because of their instincts as herd animals, they may be prone
Horse training
Horse training refers to a variety of practices that teach horses to perform certain behaviors when commanded to do so by humans. Horses are trained to be manageable by humans for everyday care as well as for equestrian activities from horse racing to therapeutic horseback riding for people with disabilities.
Historically, horses were trained for warfare, farm work, sport and transport. Today, most horse training is geared toward making horses useful for a variety of recreational and sporting equestrian pursuits. Horses are also trained for specialized jobs from