I follow this tiny farming magazine on Facebook, and this article showed up on my newsfeed. It's about how the Amish (in New England, at least) buy horses that can't qualify for races and use them to pull buggies.

http://modernfarmer.com/2013/06/raceho…

I live in an area with a large Amish population, and I've never thought much about the buggy horses, other than they all kind of look the same. I wonder if the local Amish get their horses from racetracks, too.