Then all the horses that aren't fast enough are discarded, often to the knackery. It's a disgrace. I am not familiar with the racing industry here in America but I suspect it is much the same.
You're correct, it's very much the same here in the U.S.
It bothers me that they break TBs while they're still babies, many as long yearlings.
Maybe if they weren't raced so young, there wouldn't be so many breakdowns. It's a damned, dirty, crying shame what happened to Barbaro and many others like him, but it doesn't surprise me. You just can't put that much strain on babies and not expect something bad to happen.
At the end of racing season, you can go down any shedrow and have your pick of TBs who couldn't cut it as race horses. That's how I got JJ; he stank as a racer!
I can see why your acquaintance doesn't like racing, Eventers. However, since she knows you do like it, y'all should just agree not to discuss the subject any longer.