CORNER PERMANENT TEETH APPEAR 



255 



FIG. 68. Side view of the teeth of a 

 five-year-old horse. 



have been subjected' to little wear. The tusks have 

 enlarged, but are not yet blunt, and prominently rounded 

 on the inside, as they will be when the horse approaches 

 his "teens." The per- 

 manent teeth are 

 roughish, that is, have 

 slight corrugations, 

 while the temporary 

 teeth are smooth on 

 the outer surfaces. 



The colt at five 

 has a "full" mouth, 

 and, with it, his name 

 is changed to that of 

 "horse." The female 

 is no longer called a filley, but a mare, and the "entire" 

 horse a stallion. 



Sometimes horses have shelly teeth, in which case 

 the inside of the corner teeth may not be up and in 

 wear, in fact may never come up, and always have 

 the appearance of a corner tooth that is not fully up. 

 At rare intervals horses have what is known as "hawk- 

 bill" mouths, that is, the upper incisors extend over 

 the under ones; in which case it is difficult to determine 

 the age after the horse has reached his sixth year. 

 However, in horses, malformed teeth are rare. 



Fig. 69 shows the teeth of the lower jaw when the 

 horse reaches his sixth year. The marks, or cups, have 

 disappeared, or nearly so, from the front nippers, have 

 become shallower and smaller in the laterals, and the 

 corner teeth are up on the inside and posterior corners.. 



