Horses' teeth grow continuously until some time between the ages of 25 and 30. Grass, their natural food, contains silica which is an abrasive and which constantly wears down the horse's teeth. The fibers of heavier grasses require a bit of grinding on the part of the horse. Additionally the horse reaches down to bite off grass and then raises his head to chew which changes his jaw position constantly. A horse living on natural grass will be more likely to naturally polish off the surfaces of his molars into a level. Thus the horse's dental apparatus is pretty well adapted to his natural diet. These points can be quite razor-like, actually cutting deep into one's finger when rubbed across them while inspecting the mouth. These sharp points they often cut into the horse's cheeks when they chew and cause soreness where a bit or halter pushes the cheek against a sharp tooth. They can also cause slab fractures which are discussed later in this section. In some cases a horse may have to chew unnaturally in an attempt to grind up his food. This action can often result in increased uneven wear on the teeth and in some cases generate significant excess pressure on one or more tooth which can result in serious complications including causing teeth to literally be worked loose. SIGNS AND SYMPTOMS
Your horse may be showing signs of burgeoning dental problems. Horses who become harder to keep for no apparent reason, who salivate excessively when eating, who eat slowly and with effort, who continuously drop bits of half chewed food and who show unusually coarse manure are prime candidates for a dental inspection. Other behavioral characteristics suggesting tooth problems may include unusual fussing with the bit, avoidance of bit contact, irritation when put into a dropped noseband, head tucking or head tossing, poor self carriage and not wanting to have his face and muzzle handled. PAIN AND BEHAVIOR
An uneven matching of the molars can put a strain on the temporal mandibular joint, which can be very painful. In horses it can cause them to go off feed or colic. Oftentimes mysterious colics which have no apparent cause can be traced back to dental problems. Hooks on the far back of the molars can prevent the horse's jaw from relaxing and moving forward when the rider asks him to round up, especially if he's wearing a tight dropped noseband and can't open his mouth to relieve the pressure. This situation can also be painful and result in the horse displaying unusual head movements or being unable to sustain a comfortable frame. Additionally, young horses will often experience discomfort when shedding their deciduous (baby) teeth. Lumps will often appear under the jawbones while the new teeth are trying to erupt and sometimes the horse can benefit from some human assistance in removing the old baby tooth "caps".
