CHAPTER XX. 



DISEASES OF THE FEET — continued. 



DISEASES OF THE HORN-SECRETING STRUCTURES — VILLITIS — CARBUNCLE 

 OF CORONARY BAND — FALSE-QUARTER — SAND-CRACK — HORN 

 TUMOURS — SEEDY-TOE — CORNS — THRUSH — CANKER. 



DISEASES OF THE HORN-SECRETING STRUCTURES OF THE FEET. 



Laminitis, if confined to the soft structures of the foot, might 

 with propriety be classified under this head ; but as it involves 

 the pedal bones as well as the laminse, I have arranged it under 

 the first division. 



INFLAMMATION OF THE CORONARY SUBSTANCE — VILLITIS 

 (haycock) — CORONITIS. 



Seen in heavy cart-horses, and occasionally in better-bred 

 ones. Symptoms — harshness and brittleness of the crust ; loss 

 of toughness and phability ; increased heat round the coronet 

 and upper part of the crust ; often a fulness of the coronary 

 band, and tenderness on pressure ; a shuffling gait, if both fore 

 feet are affected ; the heels are first put to the ground ; but not 

 to the same extent as in laminitis ; a desquamation, or a ten- 

 dency thereto, of the coronary substance, shown by a line of 

 separation between it and the crust ; diminished secretion of 

 horn ; and a peculiar striated or striped appearance of the crust, 

 well described by Haycock in his essay on " Villitis." The 

 peculiarity of gait is due to the animal trying to glide his feet 

 along the ground. The duration of this form of lameness is 

 variable, but it generally lasts a few weeks. It is distinguish- 

 able from laminitis by the peculiar appearance of the crust, and 

 the bulging round the coronet. 



Treatmeiit. — Eest or removal of ordinary shoes ; poultices to 

 the feet for a few days, and the application of Mr. Broad's 



