DISEASES OF THE SMALL DOMESTIC 



ANIMALS. 



PART I. 

 DISEASES OF THE RESPIRATORY SYSTEM. 



CHAPTER I. 



DISEASES OF THE NASAL PASSAGES. 



Examination.— The nasal passages are very small and do 

 not admit of a free examination. In some breeds of dogs 

 (English bull) there is an obstruction of the nasal passages 

 which during inspiration produces a peculiar snoring sound. 

 This should not be mistaken for an abnormal condition. In 

 other breeds (Collie) where the nasal passages are longer 

 and less tortuous respiration produces no sound. Dogs 

 breathe freely through the mouth. In the cat the nasal 

 passages are very small and short and can only be examined 

 at their openings. 



The examination of the nasal passages should be made as 

 follows: Good light such as ordinary daylight or strong 

 artificial light is necessary. A mirror to reflect light into 

 the nasal openings is of little value as the passages are so 

 small that the light will be reflected only a short distance. 

 A very small nasal dilator will be found useful in some of 

 the larger breeds. A small flexible probe with a pledget of 

 cotton securely wrapped around one end, large enough to 

 occlude the nostril when inserted rather high up, will at once 

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