Wild Horse Humane Contraception Programs

Wild horse and burro populations on Western US public lands exceed management targets, and humane fertility control offers a welfare-positive alternative to roundup and holding programs.

Key Facts

Approximately 70,000 wild horses and burros roam Western US public lands
The Bureau of Land Management manages an additional 60,000+ animals in holding facilities
Helicopter roundups cause significant physical and psychological trauma including injuries and deaths
PZP vaccine fertility control has been used successfully in some herds for over 20 years
Holding facility costs exceed 0 million annually and provide minimal welfare compared to the range

Welfare Considerations

Wild horse welfare is severely compromised by the current management paradigm of roundup and holding. Helicopter roundups cause acute trauma — injuries, deaths, and family group disruption. Holding facilities, though physically adequate, deny horses the freedom of movement and social complexity of range life. Humane fertility control through PZP vaccination, when consistently applied, can stabilize herd sizes on the range without these welfare costs. Investment in fertility control programs rather than roundup-and-hold infrastructure represents the most welfare-positive management pathway.

What You Can Do

Support organizations advocating for humane fertility control as primary wild horse management
Advocate for increased BLM funding for PZP vaccination programs
Oppose helicopter roundup programs where humane alternatives exist
Learn about the ecology and welfare of wild horses on Western public lands