210 BRITISH SHEEP AND SHEPHERDING. 



Symptoms. A frequent husking or prolonged soft cough, foaming 

 at the mouth and nostrils, and more or less distress and interruption 

 while feeding. 



Treatment. Keeping up the general health and strength enables 

 the lamb to make a good fight against the parasites, and for this 

 purpose extra good food should be provided, and tonics, such as 

 iron quinine and gentian mixed with the trough feed in small but 

 regular doses. The administration of turpentine in oil undoubtedly 

 hinders the development of the worms, as the volatile drug is 

 exhaled to a small extent. Doses of forty to sixty drops or more 

 in a wineglass of linseed oil, may be given at intervals of a few days. 

 No treatment hitherto adopted is so successful as that of inter- 

 tracheal injection of such agents as carbolic acid, turpentine and 

 chloroform. Weak solutions of perchloride of mercury are also 

 injected by the hypodermic syringe into direct contact with the 

 worms. A veterinary surgeon is usually employed for this work, 

 and it should not be undertaken without some instruction from 

 an expert. 



