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will sometimes shiver in a close stable in 

 cold weather. The thing that naturally 

 suggests itself to the keeper is a blanket, 

 and I have known at least three blankets 

 to be applied, and the animal would shiver 

 still. Now, paradoxical as it may at first 

 appear, this shivering is produced by the 

 closeness of the stable, and if the animal 

 is taken outdoors this shivering will in a 

 short time cease. It will be remembered, 

 as has been stated before, that the great 

 source of animal heat is the oxidation of 

 the tissues. If the animal is kept in an 

 enclosure where the oxygen supply is de- 

 ficient, he cannot bum his tissue waste 

 well, and therefore cannot keep up his 

 heat ; he is cooling down too much. If 

 you cut off the supply of material to be 



