Colo. Rev. Stat. § 35-66-108
(1) The department may implement an immunocontraception program. The department may provide staff and material support for immunocontraception for wild horses in herd management areas to keep wild horse populations at the designated appropriate management levels in each herd management area. The department may consider using different or additional scientifically proven immunocontraceptive fertility control methods after consulting with the wild horse advisory committee. The material support may include:
Source: L. 2025: Entire section added, (HB 25-1283), ch. 225, p. 1029, § 6, effective August 6.