This is a segue of sorts from the Space Equinoids thought experiment, back toward terrestrial horses and the humans who live and work with them. I often call my horses Space Aliens in horse suits, and refer to them as aliens in the pasture. They’re very much their own creatures; even humans for whom they’re nothing but sports equipment or transport will have to understand the basics of equine psychology. Horses are just too big, too strong, and too self-willed to take for granted.
No matter how dominant the human, the horse still outweighs him, and horse instincts and psychology will rule unless the human finds ways to work with them. As the adage says, “You can lead a horse to water, but you can’t make him drink.”