4 68 INFLAMMATIONS. 



Bed mange is quite of a different nature to either of the above 

 forms, being evidently a disease of the bulb which produces the 

 hair, inasmuch as the colouring matter of the hair itself is altered, 

 and, if white, the hair looks like a pale brick-dust colour, almost 

 as if the dog had been sprinkled over with this material. It first 

 shows itself almost invariably at the elbows and inside the arms, 

 then on the front and inside of the thighs, next on the buttocks, 

 and finally on the back, which is only attacked when the disease 

 has existed for some weeks or months. The health does not seem 

 to suffer, and the skin is not at all scabbed, except from the effects 

 of the scratching, which is very frequent, but not so severe as in 

 the virulent or foul mange. It appears most probable that red 

 mange is contagious, but it is by no means a settled question, as 

 it will often be seen in single dogs which are in the same kennel 

 with others free from it entirely. Of its exact nature I know 

 nothing beyond the theoretical belief, founded upon analogy, that 

 the disease is in the blood, and is not caused by any parasite. 

 Dogs which are highly fed, and which are allowed to lie before 

 the fire, are the most subject to it, while the poor half- starved 

 cur becomes affected with the foul or virulent forms. The treats 

 merit consists in lowering the diet, giving aperients (12) or (13); 

 following these up with the addition of green vegetables to the 

 food, and at the same time using one or other of the following 

 applications every other day. In obstinate cases arsenic may be 

 given internally (see page 465). 



Dressing for red mange : 



Geeen iodide of mercury, i£ drachm. 

 Spirit of turpentine, 2 drachms. 

 Lard, i£ ounce. 



Mix, rub a very little of this well into the roots of the hair every other day. 



