Einstein, The World's Smallest Miniature Horse

Controversies
Horse or pony?
There is an ongoing debate over whether a miniature horse should possess horse or pony characteristics. This is a common controversy within the miniature horse world and also is a hot debate between mini aficionados and other horse and pony breed owners. While technically any member of Equus caballus under 14 hands 2 inches (58 in; 150 cm) is termed a "pony," many breeds, including some miniature breeds, actually retain a horse phenotype and their breed registry therefore classifies them as horses.
Some miniature horse breed standards prefer pony characteristics such as short, stout legs and elongated torsos, while others prefer ordinary horse proportions. Even the name is in dispute, terms such as "Midget Pony" and "Pygmy Horse" used in addition to "Miniature horse" and breed-specific names such as Falabella. The level of controversy is reflected by the presence of over 30 different registries for miniaturized horses or ponies just within the English-speaking world.