hens, poultry, egg production, selection process, animal husbandry department
Agricultural Extension Service, South Dakota State College of Agriculture and Mechanic Arts
Experiments recently conducted by poultry investigators of the United States Department of Agriculture point out that neither the shape of a hen’s body nor the shape of her head bears any relation to her egg production. Apparently a hen’s ability to lay depends upon egg laying ancestry. The purpose of this experimental work was to find out whether or not a hen’s ability to lay could be estimated form her external appearance. The results of this work indicate that it is practically impossible to select breeding stock in poultry from the standpoint of high egg production by outward appearance, or body type. Evidence is not only lacking to support the contention that there is an egg laying type in the domestic fowl, type here being considered from the standpoint of the structure of the skeleton, but all available evidence suggests that the type of the bird as influenced by the skeleton, has no significant relationship to egg producing ability.
Weisner, O. J. and Tully, W. C., "Selecting Hens for Egg Production" (1933). SDSU Extension Circulars. 332.