Eradicated 



Island Reds 



F. A. HAYS * 



Lroody instinct in Rhode Island 

 Reds. 



Crossing No Problem 



The crossing of two breeds or 

 strains that are relatively low in 

 bloodiness may give excessive 

 broodiness in the cross. Many good 

 strains, therefore, cannot be profit- 

 ably crossed for egg and meat pro- 

 duction. This problem has led to 

 the expensive procedure of testing 

 many crosses to discover a cross that 

 will give the best results. 



A genetically nonbroody breed or 

 line may now be safely crossed with 



This hen is being injected with prolactin 

 which will reveal whether or not she h<is 

 broody instincts. 



any other line without the danger of 

 increasing the incidence of broodi- 

 ness. Such a nonbroody line can be 

 improved to such a high degree that 

 it will contribute the best characters 

 to any cross. 



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