I first encountered horse dowsing in the US where I learned that horses have two energy fields surrounding them, the inner and the outer field. On encountering the first energy field when approaching a free horse, you have to subconsciously ask permission to enter their second field. I was amazed that if I did not ask permission the horse would move away from me. If I did ask permission then I would be allowed to enter this space and progress to the level of the second energy field where again I had to ask permission to approach and touch. I would love to know more about the science behind this.
For years, there was a belief that when dowsing, the 'awake' part of your mind shut down and that you just went over to the other part. But in the last few years, it has been discovered that by putting brainwave sensors on dowsers, that the whole mind becomes active. Instead of going to sleep it goes wild. We just don't know what is behind this mass of neural activity.
Meanwhile, dowsing is incorporated into our equine therapy work as it demonstrates respect for the horse/donkey if nothing else. They have the freedom of choice to move away or to stay and it also helps individual understand body space and boundaries.