80 Pork Production 



five would stand for litter number 5. Each notch in the 

 inner right ear stands for 10, while each in the inner left 

 ear stands for 30, regardless of their position. 



The number of notches required is reduced in this 

 scheme to a minimum. Ninety litters can be numbered 

 without necessitating more than two notches in either 

 rim of each ear. In using this system, care must be taken 

 to place the notch, particularly in the outer right ear, 



Right. 



-- I 



- 2 



Fig 7. — A third plan of notching. 



in the exact position it is intended to occupy. In ex- 

 amining the ear later, care must be exercised that notches 

 in the second and third areas are not confused. 



FEEDING AND CARE TO WEANING TIME 



From this time on until the pigs are weaned, the primary 

 purpose is to keep the pigs healthy and growing. In 

 addition, economy in the selection of the ration should 

 not be lost sight of. The thrift and development of the 

 pigs will be conditioned on the extent to which the hog- 

 man successfully eliminates dirty insanitary conditions 

 and provides the combination of feeds which will meet 

 the requirements of the sow and her nursing pigs. 



