Bovine respiratory disease is the leading cause of illness and death in beef cattle, causing significant suffering that is largely preventable through improved management and vaccination.
BRD causes substantial suffering that is often underappreciated because its onset may be gradual and cattle mask illness. Affected animals experience the equivalent of severe pneumonia — difficulty breathing, chest pain, high fever, and profound malaise. Without treatment, many die slowly over days. Even treated animals often have lasting lung damage affecting growth and long-term health. The intensive feedlot system, which concentrates animals from many sources under stress, creates conditions ideal for BRD spread. Preventive management strategies reduce both animal suffering and antibiotic use.