Wild horse and burro populations in the western United States are managed through controversial roundups that raise significant welfare concerns about stress, injury, and long-term captivity.
Wild horse and burro roundups cause acute suffering through extreme exertion and fear, family group separation, and the transition to barren holding conditions. Foals and older horses are particularly vulnerable to stress-related death during and after roundups. Immunocontraception programs that reduce population growth on the range are more humane than roundup and removal, and their widespread adoption would significantly reduce welfare harms.