Reproductive stress and failure in dairy and beef cattle causes significant welfare problems through repeated pregnancy loss, hormonal manipulation, and the cumulative physiological costs of high reproductive demand.
The reproductive physiology of high-producing dairy cows is compromised by the metabolic demands of milk production in ways that cause both welfare and productivity problems. Repeated estrus cycles without conception, failed pregnancies, and multiple veterinary interventions for reproductive management impose cumulative stress on individual animals. Hormonal synchronization protocols, while management-convenient, subject cows to injections and rectal examinations that cause acute stress. Cows culled for reproductive failure — often the highest-producing cows in the herd — are sent to slaughter after years of intensive production, representing welfare costs at both ends of their productive lives.