HEAVY MORTALITY 



SOS 



adhering to the downy feathers about the vent, where it dries 

 and cakes and continues to accumulate until it completely 

 covers the opening and causes a stoppage. Unless relieved, this 

 condition, known as pasting up, will bring about an early death. 

 The mass should be removed as gently as possible, and the 

 affected parts treated with vaseline or soothing ointment. 



Spread of Contagion. — There is added mischief in these masses 

 of excreta due to the chicks picking at them and thereby con- 



{Courtesy Purdue Experiment Station) 

 Fig. 311. — Artificial pond constructed of concrete. Ducks can be raised 

 without a swimming hole, though best results are secured with one. The eggs 

 are likely to run more fertile. 



tracting the disease. In this manner the germs are spread through 

 an entire flock, unless the caretaker adopts prompt means of 

 isolating the affected members. 



Chronic Type. — Sometimes the disease is less severe, but of a 

 more chronic type, and takes longer to run its course. The 

 chicks thus afflicted waste away and gradually become weaker 

 and more emaciated, until their legs are unable to support their 

 bodies. They lean against walls or other objects for support, 



