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THE CREAMERY PATRON S HANDBOOK. 



except the possibility of the milk having become altered both by fretting 

 and work. 



It has also been observed that after sheep have been frightened or 

 worried by dogs, a number of lambs may die which have in no way been 

 disturbed or injured by the dogs. It seems in such cases as though the 

 milk had induced the trouble. 



EFFECT OF ABORTION. The Vermont Experiment Station 1 has made 

 several observations on the effect of abortion, on the quantity and quality 

 of milk, the most important of which are as follows: That there is a shrink- 

 age of over one-third of milk yield, a gain of one-tenth in quality, shrinkage 

 of nearly one-third in butter yield and a more even quality of milk throughout 

 the year was obtained. In seven out of eight cases the quality of the milk 

 both as regards fat and solids not fat, was better than that given after 

 normal calving. 



The herd at the Minnesota Experiment Station has likewise been 

 troubled with abortion. In the following table are the records of five cows 

 for six months immediately following normal calving, which preceded 

 abortion, and for six months following abortion. 



TABLE 5. 

 INFLUENCE OF ABORTION ON QUANTITY AND QUALITY OF MILK. 



Three gave less milk and butter after abortion than after normal calv- 

 ing, two gave more, four gave better milk and one milk of the same quality. 

 The differences on the whole, were less pronounced than in the Vermont 

 herd. 



EFFECT OF SICKNESS. A general disease may have an immediate ef- 

 fect upon the quantity and quality of milk. The usual result is to make 



1 Vermont Experiment Station. Report 1892. 



