1 86 THE MANAGEMENT AND DISEASES OF THE DOG. 



scratching them. If this is left unchecked, the amount of 

 irritation produced on the inflamed part gives rise to a serous 

 exudation along the margin of the flap, and ulceration quickly 

 follows. 



Treatment. — Immediately symptoms of canker are observed 

 a dose of aperient medicine should be administered, and warm 

 fomentations applied to the part. Where exudation has taken 

 place, all extraneous matter should be gently removed with 

 warm water, and mild astringents applied to the sore surface. 

 The following is a useful lotion. 



Alum 5 grains. 



Vinegar i drachm. 



Aqua I ounce. 



To be applied twice or three times a day. 



When the case will not yield to this treatment, and when 

 ulcers have formed, and show a tendency to spread, I find 

 occasionally touching the parts with nirate of silver after 

 washing is of great service ; and when the eschar is detached 

 either of the following lotions may be applied with a camel- 

 hair brush : 



Tinct. Myrrh Co ) 



Tinct. Arnica } equal parts. 



or, 



Tine. Ferri Mur i drachm. 



Acid Carbolic 5 minims. 



Aqua I ounce. 



In obstinate cases, .where the cartilage becomes diseased, 

 and remains, in spite of all that can be done, persistently so, 

 it will be advisable to remove that portion of the flap beyond 

 the line of disease ; but only in an extreme case should this 

 be done. 



