DISEASES OF DOGS : THE MANGE. 337 



Dogs are not unfrequently attacked with a 

 surfeit, in which case the coat stares, and looks 

 unhealthy, the skin is here and there denuded of 

 its hair, and scurfy, and sometimes scabs appear. 

 Surfeit is mostly induced by the dog being exposed 

 to cold, or cold and wet, or drinking cold water 

 when heated and fatigued ; and it sometimes arises 

 from bad habit of body, caused by improper diet, 

 as giving the dog too much oatmeal, salt meat, &c. 

 Sometimes I have known it arise from some pre- 

 vious disease. It is generally requisite in surfeit, 

 if the dog be well fed, to bleed and give him a 

 physicking ball: let him have also an alterative 

 ball every day, and anoint him well every other 

 day for three or four times with the ointment 

 (No. 33, p. 340.) 



I have occasionally known dogs have a surfeit 

 when there has been no eruption on the skin ; but 

 the animal looked dull, and lean, and his coat 

 stared. The alterative ball has been alone suffi- 

 cient, in these cases, to restore him to his former 

 healthy state. 



We shall not enter into a long detail concerning 

 the nature of mange ; for when we consider that 

 two opposite states of the system, viz. a repletion 

 of the system, and the contrary, are both alike 



