tamborine that statement is total rollocks. In the main horses are only pampered and cared for while they are worth money and that papmering and caring is by our standards, not the horses. Its not done for their pleasure but to keep them fit to race.
They are bred and taught to race, more or less conditioned to it, they have no idea of how dangerous it is for them so no "choice" as such. Racehorses are a breed apart, totally unsuitable for police and service work.
It particularly make me sick when owners are interviewed and say how much they love the horse and how "terrified" they will be to see it race THEN WHY DO IT???????
"no healthy horse is put down unnecessarily" of course not, not if they are worth more alive :-(