INTRODUCTION. 9 



If there is any disorder of the organs of digestion, 

 the nature of the food, the amount given, etc., must 

 be looked into; whether grit is supplied and whether 

 the fowls have sufficient exercise. 



If the respiratory organs are the seat of trouble, 

 investigation must be made as to ventilation, whether 

 sufficient, or whether not in such a way that the fowls 

 are in a direct draught, and whether the floor is not 

 damp or whether there is no draught along the floor. 



If there is a general outbreak of some infectious 

 disease, such as cholera, roup, etc., the general sani- 

 tary conditions must be looked after. 



Lice so debilitate fowls that they may be regarded 

 as an indirect cause of a great many diseases. Allow- 

 ing fowls to become too fat will cause such troubles as 

 apoplexy, congestion of the liver, diseases of the ova- 

 ries, inability to walk, etc. 



GERMS AND DISINFECTANTS. 



Since science proves that a great many diseases are 



due to germs, disinfectants must be understood and 

 used. 



The principal factors in developing germs are filth 

 and moisture, with the proper temperature. They do 

 not develop well in too high or too low temperature, 

 such as below 70 or above 110 degrees Fahr. 



Sunlight is a most excellent germ destroyer, and it 



is therefore very essential to admit plenty of this in 

 poultry houses. 

 There are a number of good disinfectants; one 



among the boat for the poultry raisor is carbolie acid, 



