I know only one method, but for my horses it was effective. First I put myself next to my horse and I sprayed on my arm so that he sees that there is no danger. You have to use the spray away from him to the ground, as long as he does not move, you can keep getting closer to him. Think of caressing it every time it does not move and you get closer. For him to understand that when he does not move he is rewarded.