Teaching the horse to shift its weight back it is very useful tool to start educating the body of the horse to the correct frame for riding alongside training it to the lightness of the aids.
Bambino here, is starting very well, but then either because I asked a little to much from him, he is bracing against my hand as you can see his under neck bulging a little bit… those mistakes do happen, but as far as we are aware of them and correct, nothing harmful can happen; at the end of the day, is thorough trial and error that we refine our clues and shaping of the horse.