Age as a factor in animal breeding

Text from the Introduction: Animal breeding to-day offers opportunities for scientific study and research. We find two classes of men engaged in the breeding of domestic animals: First: The practical breeder, who wishes to solve various problems in connection with his breeding operations, so that he may improve or buildup his herds, in order that he may secure a larger income from his capital invested in livestock, and Second: The scientific breeder, who wishes to find out how the characters are transmitted. In such a problem as this, both the scientific and the practical breeder can, no doubt, profit by a knowledge of the methods employed and the results obt a ined by the other. It was with the above idea in mind that the investigation described in Chapters I. and VII. were conducted. The remaining subject matter was taken from various sources, the chief being from data collected from the swine and poultry breeding investigations under way at this Station.