164 



NON-SPECIFIC OR GENERAL DISEASES 



and punctured wounds in the region of the bursa many cause it. 

 Tlie /'irst si/viptom usually noted is a tendency to stumble. 

 Wheu standing in the stable, the animal " points " or rests the 

 diseased foot. Sometimes it rests the heel of the lame foot on 

 the wall of the opposite foot. If both feet are affected, the animal 

 may rest them alternately, or take a position with both feet well 



Fig. 39. — A case of navicular disease involving one front foot. The diseased foot is the 



smaller. 



in front of the normal position. The inflamed structures are so 

 covered by other tissues that it is difficult to detect the local 

 inflammation, or cause the animal to flinch by applying pressure 

 over the region. As the disease becomes more advanced, the 

 lameness becomes permanent. The limb is carried forward 

 stiffly and rapidly and the animal stumbles when travelling over 

 rough ground. In time, because of the little weight thro^vn on 

 the posterior portion of the foot, the quarters may become higher, 



