Fracture of the facial bones is not as common as might be expected considering the prominent and exposed position of the face. From time to time, however, such cases are brought under the notice of the veterinary practitioner as the consequence of external violence. The face is sometimes brought forcibly into contact with fixed objects, such as walls, trees, or lamp-posts, when horses run away, or it is struck by other horses while grazing, or brought into collision with various moving bodies. The jawbones are sometimes broken by becoming fixed on hooks, in chains, or in trappy positions.