In the 17 century, royalty would keep mini horses as prized companions. The horses were bred to be mini horses. Over the centuries, selective breeding has made way for an active introduction of the dwarf gene. Breeders use different techniques to get smaller horses. Einstein is a result of one of them. Einstein is the smallest miniature horse. He belongs to Dr. Rachel Wagner and Charles Cantrell, Rachel's husband. They all live in Washington where Einstein has gone to break the Guinness World Record as being the tiniest colt. He is a miniature pony who enjoys being playful and has boundless amounts of energy. He's so cute that you can't help but watch and fall in love with him.