As with any breed of horse, you have to have a market for that breed. Most industrial nations have the resources to afford the luxury of non-working horses.
Like in full-size horses, miniatures' teats are mostly retracted when not pregnant.
Horses mostly came to the U.S. from Europe
no census is done on horses - breeds or sizes. So that is impossible to answer. Mini's are mostly pets and being small they are easy keepers so affording them is not an issue.
The Przwalskis horses live in europe and asia mostly found in plains or a larg amount of flat land
Carro, coche, automóvil, auto. It depends on locality. Coche is mostly used in Europe, carro, auto, automóvil mostly in the Americas.
Horses were brought over by the Europeans to the Americas. The Europeans brought over their horses, which some had been trained to race (mostly Arabians). They created the breed that we call today, the Thoroughbred, by mixing Arabians with other pure breeds.
horses are mostly found in grasslands
Roughly 2/3 of all cases of anorexia occur in "Western" Society. That is, the Americas and Western Europe, mostly.
Most equine stores, mostly specialty stores, should have things like that. If you can't find them there, there are special websites that sell things just for minis.
Probably mostly because horses today are used mostly for riding, not for breeding.
Christianity is practiced most today in the Americas, particularly in the United States and Brazil, as well as in Europe, with countries like Russia, Germany, and Italy having significant Christian populations. Additionally, countries in Africa such as Nigeria and the Philippines in Asia also have large Christian populations.
Horses are mostly used for work or for competitions.