Mercedes scoffs at such notions. "It is really, really difficult to harm a horse with massage, especially if all you’re using is your hands."
Here is the story and that is from The Washington Post. Apparently it is legal to give a human a massage in Maryland, and legal to shoe a horse in Maryland, but not legal to give a horse a massage in Maryland unless you own that horse. And there is no way to get the appropriate license. The Institute for Justice is taking up the case.