202 DOGS : THEIR MANAGEMENT. 



especially of the dumb kind, it is acutely affected ; but 

 of that form of disorder the writer will have to speak in 

 another place. Of acute laryngitis, as met with common- 

 ly in the horse, I have not seen an example in the ring, 

 and therefore I shall not here say anything about it. Of 

 chronic disease of the larynx there is no lack of instan- 

 ces. These are brought to us frequently, and generally 

 are submitted to our notice as cases of continued or con- 

 firmed cough. Cough, however, is but a symptom, and 

 may be no more than a sympathetic effect induced by 

 the derangement of a distant structure. "When it is 

 caused by the condition of the larynx, it has a deep 

 sound, which is never entirely changed in character, 

 however much pain induces the animal to suppress it. 

 It is essentially the same in every stage, though it may 

 be more or less full or loud, according to the state of the 

 air passage. 



This cough may start up from sympathy ; but then it 

 is always Ijess sonorous, harsh, and grating. It is also 

 less spasmodic, and likewise less the consequence of par- 

 ticular causes. "When the larynx is the seat of the affec- 

 tion, the cough, should it once begin, continues for a con- 

 siderable time ; and cold air or excitement will invariably 

 induce it. In bad cases every act of inspiration is fol- 

 lowed by a kind of noise intermediate between a grunt 

 and a cough. Sometimes the breathing is accompanied 

 by a species of roaring ; and I have seen one case in which 

 a blood-hound had every symptom of laryngismus stri- 

 dulus^ or the crowing disease of the human infant. 



