DISEASES OF DOGS : THE EAR. 357 



CHAP. XIX. 



CANKER ON THE OUTSIDE OF THE EAR. 



This affection of the ear is more frequent than 

 the former, and mostly attacks only pointers and 

 hounds. It commences with a crack at the tip, or 

 lower edge of the ear, and the affected part is 

 covered with dry scales. This crack or ulceration 

 of the ear is accompanied with some degree of 

 surrounding swelling : and the part is painful when 

 touched, and is attended with much itching, which 

 causes the dog to keep frequently shaking his head. 



This disease, there is but little doubt, is of the 

 same nature with canker in the ear ; and the most 

 probable reason that setters, water spaniels, and 

 Nowfoundland dogs, are not affected with canker 

 on the outside of the ear, is because these parts in 

 them are more defended by hair ; and hence 

 they are not so susceptible of those frequent 

 transitions from heat to cold, which prove the ex- 

 citing cause of complaint. 



In the treatment of this disease, attention should 

 be paid to feeding and exercise, which you will 

 find noticed in the last section. The following 



