This document discusses factors to consider when selecting a bull for your beef cattle herd. It emphasizes the importance of bull selection, as each bull can sire 20-40 calves over its lifetime. Key criteria for selection include physical evaluation of structural soundness, health, and performance records. Expected progeny differences (EPDs) provide genetic information on traits like birth weight, weaning weight, and milk production. The document provides an example showing how selecting a bull with higher weaning weight EPD could result in increased profits over 5 years. It also briefly discusses heterosis and designing crossbreeding systems to match market and farm resources.