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 divisioiL 



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 pliability; 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. 



Treatment. — Rest ; removal of ordinary shoes ; poultices to 

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



