22 DISEASES OF THE HOG. 



animal. All those who are engaged in the man- 

 agement of show pigs, or are dealing in them, 

 should study this subject At birth, the young pig 

 has eight teeth; four temporary incisors and four 

 temporary tushes; about the tenth day appear the 

 second and third temporary molars; at one month, 

 four incisors are out, two in the upper and two in 

 the lower jaw; about the sixth week, 

 the temporary foremost molars are visible; 

 at three months, two more are added to each 

 jaw; at this period all the milk teeth are in posi- 

 tion. Time is then allowed for the jaws and teeth 

 to grow, and at six months, in the majority of pigs, 

 a small tooth comes up on either side of the lower 

 jaw, behind the temporary tushes, between them 

 and the molars; and in the upper jaw, directly in 

 front of the molars; at six months, the fourth molar 

 appears through the gums; at nine months, the 

 corner incisors are displaced and permanent ones 

 make their appearance. The permanent tushes 

 are also cut at this time, and the fifth molar on 

 each side of both jaws makes its appearance. At 

 one year the middle incisors are replaced by per- 

 manent ones, and by this time the tushes are of a 

 considerable size; at this period the temporary in- 

 cisors are shed and replaced by permanent ones; 

 at eighteen months, in most pigs, dentition is com- 

 plete, as the lateral incisors and the sixth molar 

 are up. 



