100 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



COWS should be thoroughly disinfected before and after breeding 

 and also the bull. Newly purchased cows should be kept in quar- 

 antine and should be washed with an antiseptic solution. A cow 

 that has aborted should be immediately placed in quarantine and 

 an attendant should take care of these animals and avoid coming 

 in contact with healthy animals. The bull should be disinfected 

 before and immediately after each service. Cows should not be 

 allowed to calve in the presence of other animals. 



Member : What per cent of carbolic acid do you use in 

 feeding the cows ? 



Dr. Peters : We use the crude carbolic acid mixed so that 

 it is liquid. We start in with two drams per day until we have 

 gotten to about four drams per day; in some bad cases we have 

 given sixteen drams per day. 



Member : How long do you have to keep that up ? 



Dr. Peters : That depends entirely upon the percentage of 

 loss in the herd; in some herds we have had to keep it up three 

 or four months. If you are obliged to do that I would advise you 

 to purchase the carbolic acid in quite a quantity at a cheaper rate. 



Mr. Mason : Our experiments have shown that we can give 

 large quantities of carbolic acid without injury. I have made ex- 

 tensive experiments. The Dairy Department turned over to me 

 some old cows that they thought would not amount to anything. 

 Among them was an old bull. Professor Haecker said he would 

 have to give him three doses, then he took him away because he 

 looked so well, and sold him. We fed him for months on car- 

 bolic acid. 



Member : How long do you recommend feeding a cow car- 

 bolic acid? 



Dr. Peters : The ordinary dose that could be kept up for 

 months is the two dram doses. I want to tell you that if you have 

 a cow that is not in good condition and you want her to have that 

 glossy appearance, you just start her on a two dram dose of car- 

 bolic acid. 



