I was watching hunter derby warm up, the groom sprayed down hind legs (white) with alcohol. Enough that we could smell it several feet away. Horse was clearly uncomfortable and looked freshly clipped on legs (clipper tracks still visible). Unhappy enough that another person had to hold up front leg to allow the back legs to be sprayed.
Any reason why this would be appropriate just before a derby round?
I’ve heard of liniment and braces post work out, or witch hazel to help tighten legs. But why just prior to a round?