Welfare of Free-Roaming Horses in North America

America's wild horse (mustang) populations are managed through controversial roundups that raise significant welfare concerns.

Key Facts

Approximately 80,000 wild horses and 18,000 burros roam on public lands in the western United States
The Bureau of Land Management (BLM) manages mustang populations through aerial roundups
Roundups use helicopters to drive horses into corrals — injuries and deaths occur during each roundup
Rounded-up horses are held in long-term holding facilities — some for years — with limited space and little enrichment
Adoption programs have not kept pace with roundup rates — tens of thousands of horses are in holding
PZP (porcine zona pellucida) fertility control vaccine can reduce population growth humanely but is underused
Wild horse advocates and ranching interests are in ongoing conflict over land use and herd management

Welfare Considerations

Wild horse management in the American West involves genuine welfare harms at every stage. Helicopter roundups cause panic, injury, and separation of mares from foals. Long-term holding facilities provide food and water but none of the movement, social freedom, or environmental complexity of wild life. Adoption programs are overwhelmed. Meanwhile, fertility control through PZP vaccination offers a welfare-friendly alternative to roundups that has been demonstrated to work but is deployed on a fraction of the scale needed. The political dimensions of mustang management — ranching interests, federal land policy, and wild horse advocacy — make progress slow despite welfare evidence.

What You Can Do

Support organisations advocating for expanded PZP fertility control programs
Adopt a mustang through the BLM Mustang and Burro adoption program
Oppose roundups that lack demonstrated welfare compliance standards
Support adequate funding for holding facility improvements while adoption is pursued
Engage with federal representatives about wild horse management reform