StA, do you have birth certificates for everyone in even one line of your ancestry back to the Norman Conquest? Or even to the American Revolution? That's the equivalent of what you're asking for.
he problems is you cannot show me a lineage from an animal very UNLIKE a horse to the modern horse..
Hyracotherium, a foot-tall browser with five toes on its feet, isn't just a little unlike one of the Budweiser Clydesdales? It looks just a tad dissimilar to me...