This term is applied to small conical teeth which occasionally appear in front of the grinders of the upper jaw. In the early ancestors of the horse seven molar teeth existed on either side of the upper and lower jaw respectively. The first of the series has long since disappeared from the dental formula, but from time to time it continues to appear in a rudimentary form as what are known as Wolves' teeth (fig. 130). These vestigial remains, also known as Eye-teeth, were formerly supposed to occasion blindness, and were always promptly removed.

Teeth of Crib Biter.

Fig. 129. - Teeth of Crib-Biter.

Wolf's Tooth (shown at a).

Fig. 130. - Wolf's Tooth (shown at a).

In some districts this erroneous impression still lingers in the minds of ignorant breakers, who continue to adopt the same unnecessary practice. As matter of fact they produce little if any inconvenience, and usually disappear between two and three years old, when the first and second temporary grinders are shed.