i84 THE HORSE 



causes are not understood. The best test for shivering 

 is to back the horse, or turn it sharply round. If it is 

 a shiverer it may be unable to back, or else the muscles 

 of the limbs tremble. Both these troubles render the 

 animal unsound, and rightly so, because they impair its 

 usefulness to a greater or lesser extent, with a tendency 

 for the symptoms to become worse as the animal becomes 

 older. 



Epilepsy or Vertigo 



known under the popular title of megrims also occurs in 

 the horse, without any well understood cause. These 

 seizures come on at a moment's notice, paralysing the 

 sufferer for the time being, and if the animal is at work 

 when seized, very serious consequences may ensue. A 

 horse known to be affected with a trouble of this kind 

 is quite unsafe for any useful purpose and should be 

 destroyed. 



The central nervous system is hable to various toxic 

 troubles (see Tetanus) and to the development of 

 abnormal growths, etc., in connection with it. 



