How to Select Cows: or, The Guenon system simplified, explained, and practically applied

"How to Select Cows" by Willis P. Hazard is a practical agricultural guide written in the late 19th century. The book focuses on the Guenon system for selecting high-quality dairy cows based on specific observable traits, particularly the concept of the "escutcheon"—a distinctive mark on the cow that correlates with her milk-producing abilities. The author draws on years of experience and empirical observations to simplify this system for farmers and enthusiasts alike. The opening of the book lays out the preface, where Hazard expresses the need for a comprehensive handbook on the Guenon system to aid in proper livestock selection. He provides a brief introduction to M. Guenon, the method's originator, and emphasizes the importance of understanding and applying his classification of cows based on the escutcheon's shape and characteristics. The text outlines the various classes and orders of cows as determined by their physical markings and includes a motivating appeal for readers to apply the knowledge practically in their farming practices to improve their herds and economic outcomes.