Use of Hackney Horse Horses: The Hackney Pony is mainly used for showing, and competes in driving, riding and showmanship classes. Some are also used under saddle in dressage. Hackneys ponies are shown in four divisions depending on their size and type. The Hackney Horse can be shown single, pair, four in hand, obstacle, or under saddle. Hackney Horses are also ridden in eventing, hunter/jumper, dressage, English pleasure and competitive trail. Photo by Bob Langrish.