364 ARTIFICIAL BROODING 



perature, will be made weak and thus more susceptible to any 

 possible variations in other directions. Owing to this weakness 

 they have a desire to stay under the brooder, and this results in 

 a loss of vitality and in many deaths. 



Cannibalism. From^Jack of sufficient ash_ m_the ratioiLjpr 

 insufficient animal protein, chicks often acquire the habit of 

 devotrring one another. This trouble is usually started by the 

 taste of trteocHRrhielrfe gotten when one member of the flock be- 

 comes injured in some way, and the others pick at the wound 

 until, in many cases, the entire chick is devoured. To avoid this 

 any chick with injured parts should be immediately removed. 



FIG. 169. Chicks showing pronounced symptoms of white diarrhoaa. 



If flocks have acquired the habit, they should be given the fol- 

 lowing feed mixture in pans where all will have an equal chance 

 to get at it: Equal parts of meat scrap, dried bone, oyster shell, 

 and wheat bran. The feeding of this ration and the removal of 

 any injured chick should check the trouble. 



Contagious White Diarrhoea. This is undoubtedly the great- 

 est scourge of the poultry man, being in large measure beyond 

 his control and not directly due to mismanagement. There is no 

 positive cure known. This disease is called bacteria polorum, is 

 highly infectious, and is known to be transmitted to the offspring 

 by infected parents, the infection passing through the egg, the 

 most critical infection period being the first four days of the 

 chick's life. The symptoms are a lack of vitality, small stunted 

 body and drooping wings, and a narrow contracted appearance 

 viewed from behind (Fig. 169). When a flock is known to be 



