My wife and I (submissive married lesbian couple) were on a ponygirl farm for 4 weeks once, and it was different from anything you might see on video. One example: The tail was not attached with a butt plug but to a girdle around the waist. Simple reason for that: A butt plug makes it impossible to defecate. As ponygirls we were required to defecate wherever we stood, just like real ponies. Perhaps that was customary on that farm only; we don't have any other experiences in that direction.