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 sixmonths, 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. 
