Macaques and other monkeys used in biomedical research face severe welfare challenges from confinement, social deprivation, and invasive experimental procedures.
Non-human primate research welfare represents the most acute ethical tension in biomedical research. The cognitive sophistication that makes macaques valuable research models — complex learning, social intelligence, emotional range — makes them most capable of suffering from the conditions of research captivity. Individual housing, restraint chair procedures, and experimental interventions cause distress in animals with the cognitive capacity to understand and dread their situation. The 3Rs framework mandates replacement where possible but the pace of development of primate-free alternatives remains too slow.