182 



VETERINARY HYGIENE 



piggery it should be placed at one end of the building and made 

 continuous with it, but be separated from the piggery by 

 a sliding door as shown in figure 78. The steam generator and 

 coal store may be placed in one corner as shown, with the 

 digesters along the wall. Each digester must be provided with 

 a vent pipe to carry the waste steam out at the roof so 

 that the atmosphere does not become surcharged with moisture. 

 Bins for holding meal, &c., may be conveniently placed along the 

 opposite wall. Stores for roots and green crops should be outside 



FIG. 81. View of a weaning pen in a farrowing pen. 



the building, but close to it for economy in labour. The dung pit 

 should be at the opposite end of the building away from the food 

 preparation room and food stores. Along the back of the pens 

 there should be a f enced-in space into which the pigs may be turned 

 daily for exercise. This is a matter of convenience when the pens 

 are being cleaned out, and it is also good for the animals. 



Fitting of Pens. Breeding pens ought to be fitted with a guard 

 rail round three sides of the pen as shown in the figure, the material 

 most suitable for which is 1^ inch galvanised malleable iron piping. 

 It should be set 9 inches from the wall, and an equal distance from 

 the ground. The object of this guard is to protect the little pigs 

 when the sow lies down so that they are not crushed against the wall. 

 This is an important fixture as without it many piglings get killed. 



