All Roll Calls
Yes: 260 • No: 20
ColoradoHB25-12832025 Regular SessionHouse
Wild Horse Project Management & Immunocontraception
Sponsored By: Janice Marchman (Democratic), Larry Liston (Republican), Monica Duran (Democratic), Ty Winter (Republican)
Signed by Governor
Natural Resources & Environment
Personalized for You
How does this bill affect your finances?
Personalize government policy and PRIA will tell you what this bill means for your household, plus every other piece of legislation we track. PRIA reads each provision against your financial profile to show you exactly what matters to your wallet.
Bill Overview
Analyzed Economic Effects
4 provisions identified: 4 benefits, 0 costs, 0 mixed.
Colorado shifts wild horse birth control
The law replaces the Wild Horse Project, stewardship program, and fertility program with Department of Agriculture management. The department can use immunocontraception, a form of birth control, to keep herds at designated population targets. It can provide workers, contracts, funding, events, equipment, technology, training, certification, and internships in herd management areas. Its main focus is federally protected wild horses, but it can also address horses without federal protection. Before considering different or additional scientifically proven methods, it must consult the Wild Horse Advisory Committee.
More support options for wild horse adopters
The Department of Agriculture can provide staff, resources, and information to support wild horse adoption and training. It can develop shared equipment and staff expertise loan programs for private adopters, sanctuaries, preserves, and refuges. It can also develop training and certifications for trainers and adopters, plus adoption outreach and follow-up support. It can work with the Bureau of Land Management on training, holding, and adoption opportunities. It can coordinate with corrections officials so incarcerated people can help; no support type or funding amount is guaranteed.
New funding sources for wild horse work
The law creates a Wild Horse Fund for donations, gifts, grants, federal payments, and money lawmakers appropriate or transfer. The Department of Agriculture can seek and accept gifts, grants, and donations; the State Treasurer deposits them in the fund. When reasonable and effective, the department can expand work with nonprofits and foundations. It can also seek individual and business sponsors using wild horse images and develop a logo and brand. The law sets no funding amount, fundraising target, or required contribution.
Wild horse oversight adds yearly reports
Beginning July 1, 2026, the law creates a Wild Horse Advisory Committee with at least 14 members serving four-year terms. The commissioner must make initial appointments by that date, and the committee must meet at least yearly. It advises on adopter support, training, horse transfers, adoption, follow-up checks, public information, and birth-control methods. Members receive no state pay or reimbursement except as allowed for state employees and legislators. The committee ends September 1, 2030, following a state sunset review. Separately, the department must report spending, grants, actions, horses treated, and foals born in each herd management area each year. Reports are due January 31 to the governor and designated legislative committees, with presentation at the department’s SMART Act hearing.
Sponsors & Cosponsors
Sponsors
Janice Marchman
Democratic • Senate
Larry Liston
Republican • Senate
Monica Duran
Democratic • House
Ty Winter
Republican • House
Cosponsors
Bob Marshall
Democratic • House
Chad Clifford
Democratic • House
Eliza Hamrick
Democratic • House
Emily Sirota
Democratic • House
Jennifer Bacon
Democratic • House
Julie McCluskie
Democratic • House
Jacque Phillips
Democratic • House
Jenny Willford
Democratic • House
Kyle Brown
Democratic • House
Karen McCormick
Democratic • House
Katie Stewart
Democratic • House
Lesley Smith
Democratic • House
Mandy Lindsay
Democratic • House
Meghan Lukens
Democratic • House
Matt Soper
Republican • House
Naquetta Ricks
Democratic • House
Rep. S. Bird
Affiliation unavailable
Sheila Lieder
Democratic • House
Tisha Mauro
Democratic • House
Dafna Michaelson Jenet
Democratic • Senate
Iman Jodeh
Democratic • Senate
Roll Call Votes
House vote • 4/23/2025
Senate amendments: Concur
Yes: 64 • No: 0
House vote • 4/23/2025
Senate amendments: Repass
Yes: 60 • No: 4
Senate vote • 4/21/2025
Third reading: Bill
Yes: 29 • No: 6
Senate vote • 4/14/2025
Committee of the whole: Adopt report
Yes: 33 • No: 0
Senate vote • 4/10/2025
Refer House Bill 25-1283, as amended, to the Committee of the Whole.
Yes: 5 • No: 2
House vote • 3/19/2025
Third reading: Bill
Yes: 56 • No: 8
House vote • 3/13/2025
Refer House Bill 25-1283, as amended, to the Committee of the Whole.
Yes: 13 • No: 0
Actions Timeline
Governor Signed
5/22/2025HouseSigned by the Speaker of the House
5/12/2025HouseSigned by the President of the Senate
5/12/2025SenateSent to the Governor
5/12/2025HouseHouse Considered Senate Amendments - Result was to Concur - Repass
4/23/2025HouseHouse Considered Senate Amendments - Result was to Laid Over Daily
4/22/2025HouseSenate Third Reading Passed - No Amendments
4/21/2025SenateSenate Second Reading Passed with Amendments - Committee
4/17/2025SenateSenate Second Reading Laid Over Daily - No Amendments
4/14/2025SenateSenate Committee on Agriculture & Natural Resources Refer Amended to Senate Committee of the Whole
4/10/2025SenateIntroduced In Senate - Assigned to Agriculture & Natural Resources
3/24/2025SenateHouse Third Reading Passed - No Amendments
3/19/2025HouseHouse Third Reading Laid Over Daily - No Amendments
3/18/2025HouseHouse Second Reading Special Order - Passed with Amendments - Committee
3/17/2025HouseHouse Committee on Agriculture, Water & Natural Resources Refer Amended to House Committee of the Whole
3/13/2025HouseIntroduced In House - Assigned to Agriculture, Water & Natural Resources
2/24/2025House
Bill Text
Engrossed
Final Act
Introduced
Reengrossed
Rerevised
Revised
Signed Act