FOOD AND WATER 123 



IjTiiphangitis, heaves, founder, garget, calf cholera, colic, etc. 

 Feeding and watering should be so managed as to avoid dis- 

 semination of disease, for example tuberculosis in cattle. Given 

 a common feeding and watering trough, so that food or drink 

 can be infected by a diseased animal, and then taken by another, 

 the spread of disease may be rapid. 



Such a case is well illustrated by a common cement feed and 

 water trough, where water comes in at one end of the trough 

 and flows past the cattle to the lower end. One diseased animal 

 at the upper end may contaminate the feed and water for many. 



