Chronic Wasting Disease, a fatal prion disease affecting deer and elk, causes prolonged suffering over months to years and is spreading rapidly across North America.
CWD represents a slow welfare catastrophe for wild deer populations. Infected individuals experience a progressive decline involving confusion, inability to eat, and loss of normal behavior over many months. The suffering is real, largely invisible to casual observers, and expanding geographically. Understanding and addressing CWD requires both conservation and welfare framing.