The relationship with animals which used to be socially mediated is now direct: the farrier alone manages the behavior of the horse. He must control it in order to succeed in the shoeing. He must therefore be alert to his own sensoriality which delivers information about the horse, and he, in return, solicits all the senses of the animal. So is formed a reciprocal language between man and animal, a source of interaction which each interprets. Thus the farrier can anticipate the animal’s reactions to his own adjusted actions.