72 
MANUAL OF MODERN FARRIERY. 
When bronchitis is neglected, it produces thick wind, which 
can never afterwards be removed. 
THICK WIND. 
Symptoms. —Thick wind is indicated by short, laborious, 
and frequent breathings when the horse is at rest, and 
becomes much more evident where he is employed in 
working, whether in a cart, carriage, or as a hunter or road¬ 
ster. In the latter cases, the inspirations and expirations 
succeed each other in such rapid succession that lead us to 
suppose the animal is about to expire through suffocation, 
and his breathing can be heard at a considerable distance ; 
his sides and loins exhibit marked symptoms of the difficulty 
with which he breathes. 
Causes. —This affection for the most part owes its origin 
to previous inflammation, and more especially from inflam¬ 
mation of the bronchial tubes. While this is the case the 
vessels exude a fluid, which coagulates, and is lodged in the 
substance of the lungs or in the bronchial tubes themselves, 
and the inflammation accompanying the complaint naturally 
circumscribes the dimensions of many of the air-cells, 
and totally closes up others; which must of consequence 
lessen the capacity of the lungs for the reception of air, 
and render it necessary to breathe more rapidly to compen¬ 
sate for the limited space. This will be increased as the 
animal is put in more rapid motion. 
In morbid affections of the lungs of horses, the air-cells 
have been found completely filled with matter of a thick, grey¬ 
ish, or bluish colour ; in other cases the tubes or passages 
communicating with the air-cells have been found nearly 
invisible from the thickening of their lining, and sometimes 
entirely covered with a hard, waxy mucus. Other instances 
have occurred where the internal lining of the cells them- 
