Hurting Horses

While I'm on the topic of quotes, this one made "Quotable Quotes" on Marginal Revolution:

It is really, really difficult to harm a horse with massage, especially if all you're using is your hands.

The lady mentioned is trained to massage both humans and horses, charges the same for either, but was ordered to desist because.....
Well, the article linked said

I asked James Vallone of the Maryland Board of Chiropractic Examiners what the deal was. "The state law says that neither chiropractors nor massage therapists working under the scope of their licenses may work on anybody or anything but the human anatomy," he said. "You can't work on animals, period."

Apparently, you are still allowed to massage your own horse, so I suppose this could be done legally with a transfer of ownership. Or, since Maryland does not offer any license for horse massage, it could be argued that you can massage the horse, it is just not to be considered massage therapy.