Horses that have worn front incisors may be engaged in cribbing or other behaviors that abnormally wear down these teeth. Cribbing results in a unique wear pattern to the incisor (front) teeth, a bevel worn into the edge of the teeth. In severe cases, the teeth of cribbers can be almost completely worn down.

Horses that run their teeth along pipe rails or stall walls also develop distinct wear patterns. Fractures and other conditions affect these front teeth too. Like every other feature of a horse, the quality of tooth material varies based on genetics and environment. Some horses have poor quality dental material that wears easily and abnormally. Fortunately, stabled horses are able to do well and maintain their weight without their incisors.

Keep in mind that horses teeth constantly erupt, so if the habit changes, eventually a more normal appearing tooth will appear. The problem, however, is that cribbing and other habits rarely changes unless drastic management changes are implemented.