108 
THE VETERINARY SCIENCE 
liniment three times a day. In severe cases it is also well to 
take three tablespoonfuls of mustard, two tablespoonfuls of 
flour and enough vinegar to make the mixture like a paste. 
Rub this around the throat every night and leave it on till 
morning. Give plenty of cold water, a little at a time but 
often. Feed lots of hot mashes with a little boiled flax seed ; 
this will have a laxative efifect on the bowels. Instead of 
putting on mustard, a hot poultice of linseed and bran may 
be used and left on all night. In very severe cases, and when 
the animal's life is threatened by choking, it is well to per- 
form an operation known as tracheotomy, as described in 
Chapter XV. When this operation is performed it gives the 
horse immediate relief because the air is drawn through the 
tube instead of the nostrils. To tell when to take the tube 
out, place your hand over it, thus causing him to breathe 
through the nose. When he breathes clearly enough through 
his nose to suit you, take the tube out of the vvifidpipe and 
draw the skin together over the wound with a couple of 
stitches. Then treat as an ordinary wound. Of course, this 
operation is seldom needed except in extreme cases. 
6. Chronic Cough. 
When no other disease can be noticed it is said to be a 
case of chronic cough. 
Causes. — It may result from laryngitis or a neglected 
cold. Sometimes a horse may have this kmd of cough for 
some time before he takes heaves, or broken wind. A cough 
of this kind is generally worse during changeable weather 
and is sometimes more noticeable after eating and drinking 
or after being brought out of the stable. 
Treatment. — Give the following powder: 
Tartar Emetic H pound. 
Camphor % pound. 
Ground Digitalis % pound. 
Elecampane Ya pound. 
Mix thoroughly and give one teaspoonful night and 
morning in the feed or on the tongue. A teaspoonful of oil 
of tar in his feed or on his tongue, three times a day, is also 
recommended. 
7. Roaring. 
Breathing with a loud and unnatural sound upon any 
violent exertion principally marks this disease. More air 
