302 BEBANftEMENTS OF THE TEETH. 



aoft food, allow small quantities of dry oats, or sucli food as 

 may be most relished. 



Second Pbbiod. — The derangements of the teeth which I 

 shall next describe are occasionally met with in practice during 

 the first period. It is not that such derangements are specially 

 peculiar to the second, they are only more common to the latter 

 than to the former era. 



The principal irregularities in question consist of an abnor- 

 mal growth of the teeth ; decay of their substance which is 

 attended with pain (tooth-ache) ; and irregularities arising from 

 injury. Of the latter variety I shall not on the present occasion 

 treat upon. 



Abnobmaii Gthowths of the Teeth. — The irregularities 

 in question consist principally of an abnormal growth of the 

 teeth in two directions — 1st, irregular growth of the teeth 

 laterally ; and 2nd, undue growth of one or more of the teeth 

 in length. 



The common symptoms by which derangements of the teeth 

 may be inferred are — dribbling of saliva from the mouth, quid- 

 ding the hay, hanging down the head, and inability of the 

 animal to properly masticate the food. ' Inspection of the 

 mouth may lead to detection of irregularities of growth of the 

 teeth laterally, or an undue length of one tooth over the other ; 

 or caries of one or more of the teeth ; or two or more of these 

 affections may exist at the same time. 



In the more aggravated cases of abnormal lateral growth of 

 the teeth, the constant attrition of these projections against 

 the inside of the cheeks produces inilammation and ulceration 

 of the membrane ; also swelling of the cheek (in some instances 

 to an enormous extent), and Fistula of the Parotid Duct. 



