252 VETERINART DENTAL SURGERT. 



incisors and tusks are shed and permanent teeth take 

 their place. At twelve months the central incisors, 

 at thirteen months the third and fourth molars, at 

 fourteen months the second molar, and at eighteen 

 months the lateral incisors, are replaced by perma- 

 nent teeth. At five months the fifth molar is cut as 

 permanent, at nine months the sixth and at eighteen 

 months the seventh molars appear as permanent 

 teeth. 



DENTITION IN THE DOG. 



The dog is born with the eyes shut; they open 

 about the ninth or tenth day after birth. The whole 

 of the milk teeth are cut by that time or shortly 

 after. 



At one year to one year and three months the 

 'nferior incisors begin to wear, and the space be- 

 tween the upper central begins to widen. 



At eighteen to twenty-four months the central 

 incisors are much worn, and from two to two and 

 one-half years the lateral incisors are worn; at three 

 to four years all the incisor teeth, both upper and 

 lower, show much wear. After this, the general 

 appearance of the teeth, their bluntness and yellow 

 color, will assist in forming some idea as to the age 

 of the animal. 



