156 MANUAL FOE STABLE SERGEANTS. 



Causes. Muddy roads, picket lines and corrals, and a filthy con- 

 dition of the floor of the stables in which the animal is kept. 



Symptoms. A stinking discharge from the cleft of the frog. As 

 the disease advances the discharge and odor become more marked, 

 the cleft deepens, the horn becomes imderrun and loosened, and the 

 sensitive structures are exposed. Lameness is uaually absent, it 

 occurring only in severe cases, where the whole or a large portion of 

 the frog is diseased. 



Treatment. Clean, dry stalls are essential. Pare awav all loose 

 underrun portions of horn, dry-clean the frog thoroughly with oakum 

 and apply tincture of iodine. When the iodine dries, cover the parts 

 with pine tar. Or, after the frog has been thoroughly cleaned, pack 

 with the three sulphates, or a few drops of pure creolin. If not lame, 

 keep the animal at work. 



463. Treads. Injuries of the coronet and heels. 



Causes. Stepping with the shoe of one foot upon the coronet or 

 heel of another in turning, backing, or going to one side, and some- 

 times by a tread from another horse. Cavalry horses and lead and 

 swing horses of artillery are often injured by the horses in rear when 

 column is brought suddenly to a halt. 



Symptoms. Laceration or bruising, with heat, pain, and swelling 

 in the region of the heels or coronet. 



Treatment. Remove all portions of loosened horn and treat as 

 directed in paragraphs 353 and 357. 



