How Does Housing Influence Bovine Respiratory Disease in Dairy and Veal Calves?

Bovine respiratory disease (BRD) is a leading cause of morbidity and mortality in young cattle. Housing factors that lead to poor ventilation and stagnant air are often considered the primary reasons for high levels of endemic disease. This article reviews the literature from the past 40 years in order to determine which housing factors have been associated with respiratory disease. Penning strategy and its affect on calf respiratory health were most commonly studied. The wide variation in disease definitions and quality of reporting make drawing conclusions from the available literature extraordinarily difficult.