HORSESHOEING. 139 



or on the velvety tissue of the sole in the angle between the wall 

 and the bar, or on the fleshy leaves of the bars. Thus we dis- 

 tinguish corns of the wall, sole, and bars. 



Corns affect chiefly the front hoofs, and more often the inner 

 half than the outer. Unshod feet are seldom affected. 



According to the intensity of the lesions we distinguish : 



1. Dry Corns. — The red-stained horn is dry, and there is 

 seldom lameness. 



2. Suppurating Corns. — They are the result of intense bruising 

 followed by inflammation. The pus is either thin and dark gray- 

 ish in color, denoting a superficial inflammation of the pododerm, 

 or yellowish and thick, denoting a deep inflammation of the 

 pododerm. In the latter case a veterinarian should be caUed. 

 Lameness is usually pronounced. 



3. Chronic Corns. — In this case there is vivid discoloration of 

 horn in all possible hues. The horn is either soft, moist, and 

 lardy, or crumbling, cracked, and at times bloody. The inner 

 surface of the horn capsule has lost its normal character, and is 

 covered with horny swellings or nodules (Fig. 122, a). Some- 

 times the wing of the os pedis on that side has become morbidly 

 enlarged and loosened. A short, 



cautious gait alternates with well- 5'ig^22. 



marked lameness ; the latter ap- 

 pears whenever the shoe presses 

 too firmly on the corn, or when 

 the hoof becomes too dry. 



The causes, aside from the form 

 and quality of the hoofs and the 

 position of the limbs, lie in inju- 



■^ . ^ ±1, 1, f J Inner aspect of a quarter of a noof, 



dlClOUS dressmg OI tne noOI ana showing changes in the hom-leaves due to 



in faultv shoes. Too much trim- chronic corns: a, homy tumor resulting 



•' 1 <. from the disease. 



ming of wide and flat hoofs, ex- 

 cessive weakening of the quarters, sole, bars, and frog of all 

 other hoofs, while the toe is usually left too long, are the usual 

 causes. Shortening one quarter too much in relation to the 



