Science: Peck & Peck

How much does a rooster's success depend on his social position? At Kansas Agricultural Experiment Station, Alphaeus M. Guhl and Don C. Warren, fowl scientists, sought the answer to this question, financially important to poultrymen.

As casual observers discovered long ago, the social hierarchy in a chicken yard is as rigid as at any Army post. Each hen has a fixed position in the "pecking order": the No. i hen may peck all other hens, be pecked by none. No. 2 pecks all except No. i, is pecked only by her. The hen at...

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