140 DISEASES OF THE FEET AND LEGS. 



enabling the wall of the hoof under the crack to be 

 rasped as thin as possible. In vertical cracks the use 

 of a bar-shoe will tend to keep the foot together (page 

 81). 



Corns are occasioned by the inflexible shoe pressing 

 on that part of the sole, or possibly from friction of 

 the bones upon its internal surface. They present the 

 appearance of a red effused bruise, almost invariably 

 situated on the heel of the sole of the inside quarter of 

 the fore feet. — See illustration, fig. 3, page 130. 



When neglected, they occasion severe lameness, and 

 go on to suppuration. 



Broken knees are also frequently the result of ne- 

 glected corns. 



A horse that is habitually properly shod is never 

 likely to have a corn. It arises entirely from want of 

 attention and judgment in the smith. The groom, 

 who should always stand by when a horse is shoeing, 



ouo-ht to be instructed to see that the farrier with his 



© 



drawing-knife invariably pares out the sole at the 

 seat of corn ; it can be no injury whatever to the foot 

 when properly done, and is the best preventive of 

 corns. Also take proper care that the shoes are so 

 put on that they cannot by possibility press upon the 

 sole. 



For prevention, keep the seat of corn well pared 

 away, and dress with tar, unless in the suppurating 

 state, when it requires poultices (page 160), and the 

 ordinary treatment for that state, and full rest. 



Over-reach or Tread proceeds from the shoe of one 

 foot coming in contact with the soft or sensible part 

 above the hoof of the other. As the parts likely to 

 be affected round the coronet are full of vessels, the 



