**Acknowledgements**

The authors wish to thank those who helped in providing material, references, or lent their skill in providing, preparing, and riding horses, especially Yoni Blom of Horse Dynamics, Zijtaart, Netherlands, and the Dutch Equestrian Estate, Schaijk, Netherlands; Beth Jennings at Invicta Farms, Hemet, California, U.S.A.; Kimberly Hart at Sunland Ranch in Encinitas, California, U.S.A.; Alexandra Montan Gray of Sunland Ranch, Encinitas, California, as well as Margaretehof in Everöd, Sweden and Krókur, Iceland; Mindy Smith at Freedom Farm, Arroyo Grande, California, U. S.A.; Ageeth Polane at the Pasohoeve, Orvelte, Netherlands; Nicolette Termaat at Manege Florida, Schiermonnikoog, Netherlands; Nani Barnes at Lake View Farms, Lakeview Terrace, California, U.S.A.; Patrick Genevieve, Tongeren, Belgium; Scot MacGregor; and Maryan Zyderveld.
