INTELLIGENCE, POWER, 



The foregoing tables indicate the deteriorating influence 

 of domestication. 



Just as the Jersey cow has survival value not for itself 

 but for the use of man, so the hen also has been forced 

 into such a high level of production that she too has survival 

 value only for the use of man. Just as the cow is bred for 

 milk, the steer for meat, the pig for fat and lean, so the hen 

 is bred by man for eggs and meat. 



But just as carrying a heavy pack is hard work, so, too, 

 is the production of milk and eggs hard work. It is signifi- 

 cant to see how the thyroid gland of the hen is stepped up 

 as compared with that of the fighting cockerel. Her fame 

 is in egg-laying contests, and the organ that contributes 

 most to the egg-laying marathon is the thyroid gland. 



We should expect the adrenal glands of the fighting 

 cockerel to be larger than those of the hen. But of surprising 

 significance is the fact that the brain of the tawny eagle 

 collected in Africa is four "times larger than the brain of a 

 leghorn hen of comparable body weight. 



The large brain, the large heart, and the large adrenal 

 glands are the formula of a bird of prey. The individual- 

 istic eagle is the "lion" of the air. Although the cockerel 

 seems to be a fighting bird, a comparison of the size of his 

 brain, heart, and adrenal glands with the size of the brain, 

 heart, and adrenal glands of the tawny eagle establishes 

 the inferiority of the cockerel in this respect. 



Since eggs, butter, cheese, milk, wool, and meat are 

 produced by constant energy analogous to that required 



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