Here’s an interesting possibility that may be part of an answer to my question about what traits Jorst wanted to reproduce. This is from the Vanity Fair article (above):
“In horses, as in other species, certain experiences and conditions can cause changes to the way the DNA works in their cells. Though it has never been proved scientifically, Gutiérrez, Meeker, and Mutto suspect that these epigenetic changes, as they’re called, can result in things as complex as a horse’s learned behaviors being stored not just in the horse’s brain but encoded in every cell in the body. When the adult horse is cloned, they believe, these “cellular memories” are copied right along with the DNA. Mariano Aguerre, ranked among the top polo players in the world, has observed something along these lines with the clone of his champion gelding Califa. The original Califa has an intense fear of garden hoses; its clone is equally terrified of them.”