] J4 THICK-WIND. 



the windpipe, has been tried, and often with good effect, on the 

 supposition that the irritation may exist at the roots of the tongue 

 or the larynx. The blister has sometimes been extended through 

 the whole course of the windpipe, until it enters the chest. 



Feeding has much influence on this complaiut. Too much 

 dry feed, and especially chaff, increase it. It is aggravated 

 when the horse is suffered to eat his litter ; and is often relieved 

 when spring tares are given. Carrots afibrd decided relief. 



The seat of the disease, however, is so uncertain, and all oui 

 means and appliances so ineiEcacious, and the cough itself so 

 little interfering, and sometimes interfering not at all with the 

 health of the animal, that it is scarcely worth while to persevere 

 in any mode of treatment that is not evidently attended with 

 benefit. 



When chronic cough chiefly occurs after eating, the seat of 

 the disease is evidently in the substance of the lungs. In the 

 violent effort of the lungs to discharge their functions, when 

 laboring under congestion, irritation is produced, and the act of 

 coughing is the consequence.* 



THICK-WIND. 



When treating of pneumonia, it was observed, that not only 

 are the vessels which spread over the delicate membrane of the 

 air-cells gorged with blood, but they are sometimes ruptured, and 

 the cells are filled with blood. The black, softened, pulpy 

 appearance of the lungs thus produced, has been adverted to. If 

 the horse is not destroyed by this injury to the structure of the 

 lungs, the serous portion of the effused blood is absorbed, and the 

 lung becomes organized in that solid form. Its appearance and 

 structure then much resemble that of a Uver, and it is said to be 

 hepatized. This may occur in patches, or it may involve a con- 

 siderable portion of the lung. 



If a portion of the lung is thus rendered impervious, the 

 remainder will have additional work to perform. The same 

 quantity of blood must be supplied with air ; and if the working 

 part of the machine is diminished, it must move with great 

 velocity as well as force — the respiration must be quicker and 

 more laborious. This quick and labored breathing can be de- 

 tected even when the animal is at rest ; and it is indicated 

 plainly enough by his sad distress when he is urged to unusuai 



* Note by Mr. Spooner. — Chronic cough is generally caused by long-con- 

 tinued or neglected catarrh, or sore throat. One of the best remedies for au 

 obstinate cough tliat bids fair to become chronic is a seton under the throat 

 "hich should be kept in 



