The liqur is used to relax the horse (and his muscles). Hence the reason drunk drivers never get seriously hurt, they are relaxed. Beer is bubbly, and since horses cannot burb it back up, it could not help or make the situation worse. The liqur also kills bacteria, that sometimes gets going and is believed to be a cause of some colics, or a result of it, depending on who you ask. Although sometimes who really knows why they colic :roll:. I have never used liqure, but I know some people who have and swear by it.
There is something about riding down the street on a prancing horse that makes you feel like something...even when you aint a thing - Will Rogers