144 DISEASES OF THE GREYHOUND. 



CANKER OF THE EAR I have already described in the form in 

 which it is produced by irritation of the internal ear occasioning 

 a constant shaking of the head ; but sometimes mange or surfeit 

 attacks the ear as well as other parts, and, in that case, if the 

 internal ear is perfectly free from disease, the same applications 

 will be useful as to other parts. Here a cap tied over the head 

 is sometimes useful in preventing the dog from scratching 

 himself. 



SURFEIT is a general eruption produced either by improper food 

 or exposure to the sun, and is very different in its nature, though 

 often confounded with mange. The chief points of difference are, 

 the acuteness of the attack and the degree of fever which accom- 

 panies surfeit, and also the watery nature of the discharge. It 

 requires only a few days' low diet and a dose of Epsom salts to 

 set all to rights, unless the dog is much out of health ; in which 

 case he should be treated according to circumstances. It closely 

 resembles blotch, from which it can only be distinguished by the 

 discharge being more watery, and the patches running into one 

 another. 



AN ERUPTION BETWEEN THE TOES is a constant source of an- 

 noyance to the greyhound trainer, often coming on during severe 

 work, and laming the dog, quite independently of the soreness 

 occasioned by the friction of the road. On examining the foot it 

 will be seen that there is considerable redness, and some little 

 discharge between the toes, and often round the roots of the nails. 

 This is owing, like the ( blotch,' to overfeeding, and disappears 

 by the same method of treatment. When, however, the inflamma- 



