Einstein, The World's Smallest Miniature Horse

According to the AMHR, a "Miniature should be a small, sound, well-balanced horse and should give the impression of strength, agility and alertness. A Miniature should be eager and friendly but not skittish in disposition."
Miniature Horse Club Great Britain (MHCGB) is able to register and issue passports to miniature horses with 50% or more American blood, at least one parent must be registered with the AMHA.
The UK American Miniature Horse Society (UKAMHS) is the only miniature horse organisation in Great Britain run specifically for American Miniature Horses. The UKAMHS is affiliated to the American Miniature Horse Association (AMHA).