136 



HORSESHOEING. 



Fig. 119. 



lar bone, os pedis, or the pedal articulation, by sharp objects, 

 especially nails, is called "penetrating street-nail," or simply 

 " street nail." The resistance of the ground to the weight of the 



body drives these penetrating 

 objects through the sole or 

 frog into the foot. 



Hind hoofs are more often 

 aifected than fore-hoofs. A 

 favorite point of entrance is 

 the lateral lacuna of the frog. 

 Street-nail is favored by ex- 

 cessive thinning of the sole 

 and frog. 



Symptoms. — The symptoms 

 are, as a rule, sudden pain fol- 

 lov?ed by lameness. The first 

 assistance is usually sought in 

 the shoeing-shop. If the cause 

 of lameness be found to be a 

 penetrating nail, piece of glass, 

 or other pointed foreign body, 

 it must be carefully dravm out, 

 in doing which we should re- 

 move the entire object, not allowing pieces to break off and re- 

 main in the wound. Since it is always important to know in 

 what direction and how deep the foreign body has penetrated, 

 in order to be able to estimate the gravity of the wound, it is 

 advisable in all cases to preserve the penetrating body, that 

 it may be shown to the veterinarian, in case his services are 

 required. 



In slight injuries to the velvety tissue of the sole or frog, 

 accompanied with moderate pain, it is of no benefit to enlarge 

 the opening, though the horn of the sole or frog should be 

 thinned for the space of an inch or more around the wound, 

 followed by coohng applications. Deep, penetrating wounds 



Shod hind foot, ^vith splint dressing. 



