154. 



mfing is a natural a61; in dogs, and they purpofely 

 excite it in themfelves by eating dog-grafs ; but 

 where they are confined, as in great cities, from the 

 want of this natural cleanfer, they fall into difeafe. 

 An artificial vomit, therefore, is very proper to be 

 given now and then, and will greatly tend to pre- 

 vent difeafe. This fubjed may be feen treated on 

 more at length under the article Emetics. 



Cojiivenefs is a great caufe of difeafe in dogs : all 

 animals living on flefli require very adive exercife 

 to carry off the contents of the bowels ; when, there- 

 fore, dogs cannot be regularly exercifed, they fhould 

 have fome vegetable food ; or, if this cannot be 

 given, they (liould now and then have an artificial 

 purge. See the article Physic. 



ALTERATIVES. 

 Dogs are very fubjedt to difeafes of the fkin from 

 too full feeding, want of exercife, &c. ; in which 

 cafes alteratives are very ufeful. Some dogs, as 

 thofe of light colour with wiry hair, are fubjed to 

 rednefs and itching of the ikm at all times, which, 

 if not prevented, degenerates into mange. A courfe 

 of alterative medicines, in ihefe cafes, now and then, 

 will keep thefe dogs in health, and prevent this itch- 

 ing and rednefs of the ikin from becoming more 

 troublefome. In fpring and fall moft dogs are more 

 or Icfs affeded in their hides ; and at this time alter- 



