MANAGEMENT OF DAIRY CATTLE 87 



sanirary condition of the milk is better than under ordinary 

 conditions, but with careless handling of the machine the 

 milk may be in worse sanitary condition than that produced 

 by 1 and milking. So far the milking machine seems adapted 

 only to herds of 30 cows or more. One milker with a suitable 

 outfit can milk from 25 to 30 cows per hour. The indica- 

 tions are that the use of the milking machine will be widely 

 extended in the near future. As a result many more large 

 dairy herds will be kept. The labor problem is at present 

 the main factor in the way of maintaining large herds. The 

 proper management of a machine requires considerable 

 mechanical ability. 



68. Cows with Leaky Teats. Some cows lose a portion 

 of the milk by leakage from the teats before milking. No 

 practical remedy has been devised. If conditions warrant 

 the trouble, the cow may be milked three times a day or the 

 teat opening may be closed after the milking by applying 

 collodion. 



69. Bloody Milk. Bloody milk is much more common 

 than is generally supposed. Traces of blood are often found 

 in the separator bowl after milk has been separated although 

 its presence was not suspected. It is not an indication of 

 disease or any unhealthy condition of the cow. It is caused 

 by the rupture of a small blood vessel, which allows the 

 blood to escape into the milk ducts. Sometimes certain 

 cows have this trouble for several months but more often 

 it appears only once or twice. It cannot be prevented or 

 stopped by any specific treatment. One should see that 

 the cow is not being injured in the udder by being stepped 

 on by cows in adjoining stalls or by any other cause. As 

 a rule the cow recovers in a short time with no special treat- 

 ment. 



