126 THE farmer's VETERINARIAN 



into the small cavities in the head, where develop- 

 ment goes on. It is during this period of develop- 

 ment in the head that most of the damage is done. 

 As the grubs grow larger a discharge from the 

 nostril is noticed, which may soon become very 

 thick and sticky, gumming up the nostrils and 

 making breathing difficult. The sheep will often 

 carry their heads low, but will frequently raise 

 their heads and point their noses straight up. 



The treatment may be either preventive or sur- 

 gical. The first is within the reach of everyone 

 owning sheep. Where only a few sheep are owned 

 each individual should be caught and a mixture of 

 tar and lard, or oil of tar and lard, applied to the 

 nostril with a brush. This can be done in a short 

 time and should be repeated every ten days or two 

 weeks during the warm months. Narrow salt 

 troughs may be made and the edges smeared with 

 tar so that the sheep will get tar on their noses 

 when they take salt. Turpentine may be applied 

 high up in the nostril by means of a feather. Begin 

 the preventive treatment early in the spring or 

 whenever you know by the action of the sheep that 

 the fly is bothering them, and you will have better 

 success than to wait until the sheep are affected 

 and undertake to cure them. 



BOTS.— See Bot Flies. 



BROKEN WIND.— See Heaves. 



BRONCHITIS.— A common disease of domestic 

 animals attacking the bronchial tubes. It may be 

 chronic, but is usually acute, and may affect one 

 side or both. The most frequent causes of bron- 

 chial catarrh are colds. A sudden cooling of a 

 heated body by drenching, by the breathing of cold 

 damp air, may all bring on the disorder. Dust, 

 smoke or gas, when inhaled, often produces the 



