It is neither horse whispering nor another method that uses positive and negative reinforcement intelligently to shape the horse in a desired direction.
If you ask so long until the horse gives the correct answer, then unfortunately this is still a monologue. In a dialogue, you are really interested in what the horse wants to say and he also gets the right to say "No".
Being together with horses in this way can build a relationship with them that goes beyond the ratio of good co-workers and that comes quite close to the meaning of true friendship.