In this video tutorial from thinklikeahorse you will learn how to Sack out and desensitize a horse. It is about removing fear from the horse and not creating fear. By this the horse learns not to react instinctively to its fear. This also enables you to read your horse. You first got to look for things that create different kinds of noises that you can use to sack out your horse. The video demonstrates various kinds of tools made out of waste cloth, plastic bags tied to sticks, rope, whip etc. You can use them to train the horse with sound, sight and feel of various objects. Use a tool for a little while to create a stimulus and then remove it. The horse will learn to remain undisturbed to such stimulus in future when it id with you. That is sacking out your horse.