CASTRATKIN OF THI<; BdAR 



109 



believe that scrotal lieriiia of the boar is one condition which can be trutli- 

 fnlly laid at the door of hereditary transmission in 95 per cent of cases. 

 They are of congenital origin, the internal abdominal ring being open at 

 birth and nature fails to close it afterwarcL Tn my own practice I 

 recall one sow in particidar which presented hei' owner with a bnnch of 

 rnptnred pigs twice each year. This sow gave birth to large litters and 

 was kept as a brood sow on that acconnt. Tliese litters were nsnally abont 



Fig. 90- 



-View of the scrotum after animal Is hung up for operation. 



