224 DAIRY CATTLE AND MILK PRODUCTION 



lund Manipulation. It also appeared that this milk was in 

 addition to the amount secured when the manipulation was 

 not practiced. This would indicate the amount of this resid- 

 ual milk is all gain. 



They further compared the Hegelund Manipulation with 

 ordinary stripping. They conclude that, while the Hegelund 

 Method is effective as a means of securing all the milk possible, 

 practically as good results are obtained by ordinary strip- 

 ping when properly carried out. These results are in accord 

 with those found by Woll. 



In one of their tests two milkers were leaving 20 cents worth 

 of fat each 'every milking, that could be removed by proper 

 methods. In another herd 8 per cent of the fat and 16.9 

 per cent of the fat was lost by failure to milk out all secreted. 

 These investigations showed clearly the necessity of careful 

 work in milking; otherwise heavy financial loss will occur. 

 All the milk secreted by the cow should be removed, as that left 

 in the udder by a careless milker is lost. 



Hard-Milking Cows. Some cows are considerable of an 

 annoyance to the milker on account of milking unusually 

 hard. This is generally caused by a strong sphincter muscle, 

 which closes the teat opening tighter than it should. This 

 condition may be remedied by proper treatment. For most 

 cases the use of teat plugs is sufficient. These plugs, which are 

 made of lead or hard rubber, are placed in the teat duct, and 

 a tape tied around the teat through the eyehole in the plug. 

 The animal wears the plug from one milking to another. 

 This is continued until the muscles are somewhat relaxed and 

 the opening remains larger. In some cases this treatment is 

 not sufficient to cause a permanent enlarging of the opening. 

 In other cases the difficulty in milking is caused by a hard 



