Ours don't come from slaughter bound horses!
Saddlebred switches (well, most of them, anyway) come from other saddlebreds...retirees, broodmares, etc.
There was one horse at the ASB farm I worked at that had a tail 20 feet long...when he retired, they cut off the length and had a switch made
I have seen the one's with "real skin"...those are disturbing. These have yarn/nylon as the backing