10*2 THICK WIND. 



towards putrefaction ; they are, in fact, what the 

 farrier calls rotten. 



It is not invariably, however, that under the best 

 treatment, even when the horse does not die, he 

 is perfectly restored. The life may be saved ; but 

 the disease may have produced changes such as no 

 human power could counteract. The horse may ap- 

 parently be restored to health ; but he will never be a 

 sound horse. He may have 



THICK WIND. 



There is usually a great deal of congestion of the 

 lungs in pneumonia. Many of the air-cells may then 

 be clogged, or the adjacent vessels then be loaded; 

 and when these last have long been distended, the 

 blood becomes in a manner organized. The cells 

 through the obliteration of their vessels soon cease to 

 exist. The function of respiration, however, must be 

 carried on ; and if one portion of the lungs is thus 

 taken away, that which remains pervious must work 

 the quicker; the acfc of breathing will be more labori- 

 ously performed ; it must be more rapidly repeated, 

 and the horse will have thick wind. 



Thick wind is sometimes the consequence of bron- 

 chitis, or influenza. Then it arises from the air-pas- 

 sages having been thickened by the inflammation, 

 and the lining membrane of the air-tubes having be- 

 come impervious ; consequently? not only a smaller 

 quantity of air is admitted into the lung, but of this 

 smaller quantity the thickened membrane allows no 

 particle to come in contact with the blood. The 



