SHELLY FEET 



367 



edge of the crack on both sides, and driving fine nails or pieces of wire 

 through them, and clinching them at both ends (fig. 387). A more 

 effective means of doing this is the Vachette clamp (fig. 388), but to insert 

 it a special set of instruments is required, comprising a cautery iron and 



Fig. 388. Sand Crack Clamped 



Fig. 390. Sand Crack, showing method 

 of paring the crust. 



Fig. 389. Tools for Clamping Sand Crack 



A, Iron ; B, Forceps for turning-in the 

 ends of the clamp c. 



forceps (fig. 389). A piece of tape tightly bound round the hoof will 

 sometimes suffice to keep the parts together where the work is not heavy. 

 In all cases of this disorder the crust immediately under the crack should 

 be pared away sufficiently to prevent any bearing at this point on the 

 shoe (fig. 390). In quarter cracks a bar shoe should be substituted for 

 the ordinary one. 



SHELLY FEET 



Although not a disease, shelly feet mark the existence of a serious 

 defect in the secreting properties of the horn-producing structures of the 

 foot. Large numbers of otherwise valuable animals are rendered trouble- 

 some and sometimes practically worthless in consequence of a want of 



