Many years ago, as a young programmer at an electronics manufacturing plant, I had to have ESD shoes and a touch a discharger plate before entering the plant to change printer ribbons or fix their computers. Closer to the fab, everyone was required to wear ESD coveralls. ESD was a very serious threat to the fragile boards and circuits that cost many hundred of dollars each.
When visitors come, they got to wear ESD straps on their feet and ankles. They could not cross the red lines on the floor.
Anyway, I wonder if touching a horse's hair first (no nerves there, yes?) would ground out the ESD? Or, maybe having the horse brush by a grounding plate (very impractical, of course).
Oops that blew up ... go figure!!