434 Dentition as indicative of the Age 
the changing of the temporary tusks, in these cases no hesita- 
tion is felt in disqualifying the animals. 
One year old is the age when, according to received 
opinions, the central permanent incisors are cut. It is, 
however, the rule to find the temporary incisors still in 
their places in pigs which are just under the age of one 
yeax ; and although the permanent teeth, when cut, advance 
very rapidly, a pig entered as not exceeding one year would 
be looked upon with much suspicion if the central permanent 
Fig. 47. — Incisors and Tuslcs o f Pig at nine months. 
incisors were found to be fully up ; and if, at the same time, 
some of the anterior temporary molars had fallen, and the 
permanent teeth were filling their places, the animal would be 
disqualified. 
The fifth molar tooth is always cut between ten and twelve 
months, and its perfect eruption may be taken as evidence that 
the pig has reached the age of one year. In the illustration 
(Fig. 48), the recently cut central incisors are shown, a state of 
dentition which is seen in very forward animals at the completion 
of one year of age. 
Shortly after the completion of one year, the three anterior 
temporary molars fall irregularly ; and by the time the animal 
is fifteen months old, the three anterior permanent molars arc in 
