278 PRINCIPLES OF VETERINARY SCIENCE 



coronet (quittor). A three-quarter shoe is best for an ordinary 

 non-suppurating corn, as it removes pressure from ihe inflamed 

 part and relieves lameness. 



THRUSH 



Thrush results from lack of care of the feet. It is characterized 

 by an abnormal secretion from the cleft of the frog. When the 

 horse is allowed to stand in a filthy place where much moisture 

 is present, the horn becomes soft and loose, its pores open up, 

 and filth enters. The symptoms are the discharge of a dark- 

 colored pus, with a very offensive odor. This may later become 

 profuse and undermine the horn of the frog and cause lameness. 

 There is some heat noticeable in the affected foot and the hoof 

 dries out and gets brittle. Treatment consists in providing a 

 clean, dry stall. All the loose portions of horn should be pared 

 away, so that a dressing may be applied directly to the diseased 

 parts. After thoroughly washing and drying the foot, powdered 

 calomel, or burnt alum may be packed into the crevices. 



FOUNDER OR LAMINITIS 



This is a painful disease, resulting from congestion of blood 

 between the hoof and the sensitive structures beneath. It is 

 often called "water founder," from its appearance soon after 

 watering a very hot or tired horse. The fore feet are most com- 

 monly affected. 



Acute founder is the form in which founder first appears. Its 

 causes are overfeeding, or feeding too soon after violent exercise; 

 large draughts of cold water when very warm; rapid cooling 

 of the surface of the body when very sweaty; concussion from 

 excessive driving on hard roads; lack of exercise leading to re- 

 tarded circulation of blood in the feet; undue pressure on one 

 foot from a painful condition in the opposite foot; circulatory 

 disturbances coincident with parturition or indigestion. 



Symptoms. — The disease is ushered in with a chill. There 

 is profuse sweating, rapid breathing, groaning from pain, loss 

 of appetite, and a rise of temperature (103° to 104°F.). The feet 

 are hot, very tender to taps with the hammer, and there is a 

 distinct pulsation in their arteries. The animal exerts every 

 effort to take the weight off the fore feet in which the pain is 



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