340 MANAGEMENT AND FEEDING OF SHEEP 



ful to sheep with heavy fleeces, whether short or long; 

 and, third, by the catarrhal troubles which are generated 

 when the flock emerges from such warm surroundings 

 into an atmosphere of low temperatures. 



Artificial ventilation is not called for where sheep are 

 housed in, or rather are protected by a shed that is open 

 in front, and in which they are given free access to yards 

 in front of the shed. Rest in a shed under such conditions 

 is not greatly different from resting overnight in an un- 

 covered yard. In such instances, however, there should 

 be no open windows or doors at the ends or rear of such 

 a structure that would produce air currents when it is 

 occupied with sheep while the temperature is low. 



In sheep houses of ordinary construction, which con- 

 sist of but one story and which have doors only on the lee 

 side, with windows that may be opened on occasion on 

 the other side, by keeping the doors open, enough fresh 

 air will ordinarily be secured. Should the wind blow 

 from what is ordinarily the lee side, ventilation may be 

 secured by closing the doors and opening the rear win- 

 dows. 



Should the sheep house have divisions on both sides 

 of a passage which runs lengthwise through it, then the 

 plan is good which has doors and windows on both sides 

 of the house. Fresh air may be admitted by opening the 

 doors or windows, or both, on one side only, according 

 as the wind may blow. In this way fresh air may be ad- 

 mitted at all times and in abundant supply, as shown in 

 Fig. 18. When there is a loft overhead, the shutes which 

 extend upward in the same may be made to render sub- 

 stantial service in carrying away the warm air. Except 

 in very still and mild weather the windows or doors, or 

 both, should only be open on one side at the same time. 



Ventilation in the rear divisions of a basement is not 

 so easily secured when these have a bank of earth on one 

 side. Usually, however, windows may be secured, if 

 placed high, though in some instances it may be necessary 



