ANATOMY, UNSOUNDNESS, AND AGE OF A HORSE 5I 



Fig. 34.- 



■Lower Front Teeth at Three 

 Years of Age 



bone between the foal and the mature horse makes 

 a change from milk to permanent teeth necessary. 



Three years old. — 

 At approximately two ^ 



years and nine months 

 of age the permanent 

 pair of center incisors 

 replace the temporary 

 ones in both the lower 

 and upper jaws, and by 

 the time the horse is 

 three years of age they 

 are up and ready for use. 

 They are easily recog- 

 nized as they have deep 

 hollow cups and are 

 much longer than the 

 temporary teeth. In 

 the male tusks may ap- 

 pear at about this time. 



(Fig- 34-) 



Four years old. — 

 At approximately three 

 years and nine months 

 of age, the intermediate 

 pair of permanent in- 

 cisors appear in both 

 the lower and upper 

 jaws, and by the 

 time the horse is 

 four years old they are 

 up and ready for use. 

 The center pair show 

 wear and the cups are 

 about one-third gone. 



(Fig- 35-) 



Five years old. — 

 At approximately four years and nine months, the per- 



Fig. 35. — Lo^jfER Front Teeth at Four 

 Years of Age 



Fig. 36. — Lower Front Teeth at Five 

 Years of Age 



37. — Lower Front Teeth AT Six 

 Years of Age 



