Wild horse and burro management on US public lands involves difficult welfare trade-offs between overpopulation impacts and the welfare costs of roundup and captive holding.
Wild horse management welfare involves both the welfare costs of unmanaged population growth — resource depletion, starvation, and disease in overcrowded ranges — and the welfare costs of management interventions including helicopter roundups and long-term captive holding. Helicopter roundups cause acute fear, exertion injuries, and foal-mare separation that distresses both individuals. Long-term holding in feedlots denies horses the wide-ranging behavior of their wild existence for years or lifetimes. Fertility control through PZP vaccination allows population management with far lower welfare impact but works slowly. A welfare-optimized approach invests heavily in on-range fertility control to prevent roundup necessity while improving roundup protocols and adoption programs for horses already in holding. This is politically and logistically complex but represents the welfare-superior path.