THE SOW 233 
where many pigs are kept seems to be poisonous to little pigs, 
when the weather is cold and the doors and windows have to 
be closed, in spite of ordinarily good methods of ventilation. 
The writer has had good results from sows farrowing in 
portable single pens placed in a sheltered yard, even in zero 
weather. Tarred paper was put on the studding, and the pen 
tightly boarded outside and inside. A ceiling of slats was put 
in the pen, and the space above the ceiling stuffed with straw. 
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A window in the side, a small ventilator running from the 
ceiling out through the roof, and a lighted lantern hung in the 
pen on the coldest days when the pigs were very small, com- 
pleted the equipment. The air in this pen always felt dry 
and comfortable, and the pigs all kept healthy and thrifty. 
Tf the ventilating shaft runs up from near the floor, it will be 
better. 
It pays to treat sows kindly and to have them quiet. If 
they are on good terms with the attendant and regard him as 
