Have you tried teaching (a) ground tying or (b) leaving her in the cross ties and ignoring the behavior? Option (b) might take a while. I had a trainer who said "Horses needed to learn to control their emotions."

Per the U. Miami http://ctp.iccas.miami.edu/FACTS_Web/Cuba%20Facts%20Issue%2043%20December.htm Pre-Castro Cuba In the 1950's Cuba was, socially and economically, a relatively advanced country, certainly by Latin American standards and, in some areas, by world standards. During the 1950's, the Cuban ...