CHRONIC COUGH, LARYNGITIS, ETC. 483 
CHRONIC COUGH. 
By THIs TERM is understood a cough that comes on without any fever 
or evidences of the horse having taken cold. It differs in this respect 
from chronic bronchitis, which generally supervenes upon the acute form, 
and is always attended in the early stage by feverishness. It appears pro- 
bable that chronic cough is dependent upon an unnatural stimulus to the 
mucous membrane, for it almost always makes its appearance when much 
corn is given without due preparation, and ceases on a return to green food. 
It is, therefore, very commonly termed astomach cough. The symptoms are 
all summed up in the presence of a dry cough, which is seldom manifested 
while in the stable, but comes on whenever the breathing is hastened by 
any pace beyond a walk. Two or three coughs are then given, and the 
horse perhaps is able to go on with his work, but after resting for a few 
minutes, and again starting, it comes on again, and annoys the rider or 
driver by its tantalizing promise of disappearance followed by disap- 
pointment. Very often this kind of cough is caused by the irritation 
of worms, but any kind of disorder of the digestive organs appears to 
have the power of producing it. Zhe usual treatment for chronic bronchitis 
seems here to be quite powerless, and the only plan of proceeding likely 
to be attended with success, is to look for the cause of the irritation, and 
remove it. Sometimes this will be found in a hot stable, the horse having 
previously been accustomed to a cool one. Here the alteration of the 
temperature by ten or fifteen degrees will in a few days effect a cure, and 
nothing else is required. Again, it may be that the corn has been over- 
done, in which case a gentle dose of physic, followed by a diminished 
allowance of corn, and a bran-mash twice a week, will be successful. If 
the stomach is much disordered, green food will be the best stimulus to a 
healthy condition, or in its absence a few warm cordial balls may be tried. 
The existence of worms should be ascertained in doubtful cases, and if 
they are present, the proper remedies must be given for their removal. 
Linseed oil and spirit of turpentine, which are both excellent worm reme- 
dies, are highly recommended in chronic cough, and whether or not their 
good effect is due to their antagonism to worms, they may be regarded as 
specially useful. 
A very successful combination is the following mixture :— 
Take of Spirit of Turpentine. . . . . . 2 ounces. 
Mucilage of Acacia §. . .). . 5') Grounces, 
Gum Ammoniacum ... . . . ounce. 
Waudanuniy yen is) ct osu siuel 4 ounces; 
Wiateri on). 2 quarts 
Mix, and give half-a-pint as a drench every night : the bottle must be well shaken 
before pouring out the dose. 
LARYNGITIS, ROARING, WHISTLING, &c. 
ONE OF THE MOST COMMON diseases among well-bred horses of the 
present day is the existence of some mechanical impediment to the pas- 
sage of the air into the lungs, causing the animal to “make a noise.” The 
exact nature of the sound has little or no practical bearing on the cause 
that produces it; that is to say, it cannot be predicated that roaring is 
produced by laryngitis ; nor that whistling is the result of a palsy of 
some particular muscle, but undoubtedly it may safely be asserted that all 
lesions of the larynx, by which the shape and area of its opening (rima 
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