DIFFICULTY OF BREATHING. 345 



is very much increased by exercise, the heat of 

 the fire, dust, &;c. A cough also usually attends 

 this affection of the lungs, which sometimes 

 harasses the dog exceedingly. In some cases 

 there is a rattling in the throat ; this ratthng in 

 the throat commonly arises from an effusion of 

 coagulable lymph in the windpipe, or its branches. 



Difficulty of breathing in dogs most frequently 

 proceeds from a superfluous quantity of fat about 

 the heart and its vessels, which causes a congestion 

 of blood in the lungs, and thereby impairs their 

 functions. Sometimes this difficulty of breathing 

 seems to arise solely from congestion of blood in 

 the lungs, or too great a quantity of blood passing 

 through them, which preternatural quantity of 

 blood prevents the lungs from collapsing to the 

 same extent as when these organs are in a perfect 

 state of health. 



The mode of removing this affection of the lungs 

 appears obvious ; it consists in averting the causes 

 that induce the complaint, which will mostly be 

 accomplished by administering occasionally any of 

 the physicking balls (p. .S04), and by increasing 

 his exercise, and lessening the quantity of food 

 given to him. It will be requisite sometimes 

 to give two or three physicking balls a week, 



