CHAPTEE XXIL 



LAMENESS FOLLOWING ACUTE SUPERFICIATi 



AND PARENCHYMATOUS INFLAMMATION 



OF THE PODOPHYLLOUS MEMBRANE. 



History. — Usually lameness is the result of wounds of 

 the lioruy box and underlying tissues, as caulking, pricking, 

 nail-puncture, cutting out of corns, poorl}^ fitting shoes, 

 leaving the shoe on too long, prolonged rest on hard ground, 

 and empirical treatment with oil of turpentine, acids, etc. 



Inspection. — More or less supporting-leg lameness, increas- 

 ing on hard ground and going down hill. In superficial 

 inflammation one may see discharge of a thin, grayish or 

 blackish matter flowing from a wound, as in nail-puncture, 

 artificial openings ; or the liquid, by burrowing, appears 

 between the coronary cushion and the horny wall, at the 

 heel or at the frog. At the point of perforation no swelling is 

 noticeable. In parenchymatous inflammation, inflammatoiy 

 products of a thick, yellowish nature are apt to perforate 

 the skin at the coronet or heel. The point of perfora- 

 tion is surrounded by severe swelling. Whenever the 

 product of the superficial inflammation appears on the 

 coronet or heel, the seat of the trouble is readily found 

 by following the direction of the horn tubules, from the 

 point of perforation to the white line, where further 

 examination reveals the seat of lameness. The animal 

 points, and it is tolerably safe to say that resting upon the 

 toe means disease somewhere in the posterior half of the 



