Estray Livestock Laws in Colorado: What You Must Know If You Find Stray Animals
July 24, 2026
Spotting a loose horse or a wandering cow on your property — or along a rural Colorado highway — puts you in a situation with real legal weight behind it. Colorado law does not treat stray livestock as abandoned property you can simply keep or ignore. The state has a dedicated body of statutes that spell out exactly what you must do, what you cannot do, and who ultimately decides the animal’s fate.
Whether you are a rural landowner, a rancher whose animal has gone missing, or someone who found a steer grazing along a county road, understanding Colorado’s estray framework protects you legally and ensures the animal is handled properly. This guide walks through each stage of that process, from the legal definition of an estray all the way through what happens when no owner ever comes forward.
Important Note: This article reflects Colorado Revised Statutes as published through the 2024 legislative session. Always verify the current version of any statute at the official Colorado General Assembly website or through a licensed attorney before taking legal action.
What Is an Estray and How Colorado Law Defines It
Under Colorado law, an “estray” is any bovine animal, horse, mule, ass, or alternative livestock found running at large upon public or private lands in the state of Colorado whose owner is either known or unknown in the section where found, or which is outside the limits of its usual range or pasture. This definition comes from C.R.S. § 35-44-101, the opening section of Title 35, Article 44 — Colorado’s dedicated estray statute.
The definition is broader than many people expect. An animal does not have to be completely ownerless to qualify as an estray. If a horse has simply wandered beyond its normal pasture — even if its owner is known — it can still meet the legal threshold. This matters because it determines which rules apply to you the moment you encounter that animal.
“Alternative livestock,” referenced in the definition, includes animals such as elk, fallow deer, and reindeer raised under the Alternative Livestock Act (C.R.S. § 35-41.5-102). So the estray framework covers more than just traditional cattle and horses — it extends to any livestock species the state formally recognizes.
One critical boundary: it is unlawful for any person, corporation, or company, or any of its employees or agents, to take into its custody any such estray and retain possession of the same, except as provided in this article. In plain terms, you cannot simply hold a stray animal without following the statutory process. Doing so exposes you to legal liability regardless of how good your intentions are.
Key Insight: The estray rules apply on both public and private land. Finding a loose steer on your own pasture does not give you any ownership rights — Colorado law controls what happens next.
Your Obligations When You Find Stray Livestock in Colorado
The moment you take custody of an estray, the clock starts on a series of legal duties. Colorado does not allow passive possession — you have affirmative obligations from the start. The statutes under Title 35, Article 44 of the Colorado Revised Statutes govern the entire process.
Your first obligation is notification. It is the duty of the person taking custody of such livestock to notify in writing within five days after the taking into custody thereof the owner or person in charge of such livestock. If you know who owns the animal, you must reach out to them directly and in writing within that five-day window.
When the owner is unknown or cannot be located, a second duty kicks in. If the owner or person in charge of such livestock is not known to the person taking the livestock into custody or cannot be found after diligent search and inquiry, then the person so taking custody of such livestock shall publish within one week a notice containing a full description of such livestock, including all marks and brands as nearly as can be ascertained, in a paper published nearest the place where the alleged damage occurred.
That published notice must be detailed. Documenting brands, ear tags, color, sex, approximate age, and any identifying marks is not just good practice — it is a legal requirement. If you are not familiar with reading livestock brands, contact the Colorado Department of Agriculture, which oversees the State Board of Stock Inspection Commissioners. You may also find it useful to review Colorado’s livestock transportation laws for context on how the state regulates livestock movement more broadly.
Pro Tip: Take dated photographs of every brand, tag, and physical marking on the animal as soon as you take custody. This documentation protects you if ownership is later disputed and supports the accuracy of your published notice.
How to Report an Estray to Authorities in Colorado
Reporting an estray is not optional — it is a legal step built into the statute. The State Board of Stock Inspection Commissioners is the primary state authority over estray livestock in Colorado. Title 35, Article 44 of the Colorado Revised Statutes governs estrays, spanning sections 35-44-101 through 35-44-114. The Board’s inspectors are authorized to receive estray reports, conduct inspections, and take custody of animals when appropriate.
In practice, your reporting path typically involves two parallel steps:
- Contact your county sheriff or local law enforcement. It is the duty of every Colorado state trooper, sheriff, or other peace officer to prefer charges against any person violating this section and take custody of such livestock and place them on feed and water. Peace officers have explicit authority to intervene when livestock are found running at large.
- Notify the State Board of Stock Inspection Commissioners. The Board’s inspectors handle brand verification, estray registration, and coordination with owners. You can reach the Colorado Department of Agriculture’s livestock inspection program through the official CDA website.
If you believe the animal may have been stolen rather than simply lost, Colorado law treats that situation differently. Stolen livestock found at any inspection location shall be handled in accordance with C.R.S. § 18-4-405, and animals found to be of questionable title shall be handled as estrays until clear and legal title has been established. When in doubt, report to both the sheriff and the Board so the appropriate track can be determined.
Law enforcement also has authority to place the animal with a responsible caretaker while the situation is sorted out. Such livestock may be placed by such officer in the custody of a responsible person who shall care for the same pending disposition of any court action. If an officer places an animal in your care under this authority, make sure you get that arrangement in writing.
Care and Cost Responsibilities While Holding an Estray in Colorado
Taking an estray into custody creates a caretaking responsibility — and a financial one. Colorado law recognizes that whoever holds the animal incurs real costs for feed, water, shelter, and veterinary care. Those costs are not simply absorbed as a civic duty; they are protected by a statutory lien.
In the event the owner of such livestock cannot be found within ten days after the date of the publication of the notice, the livestock shall be an estray and the State Board of Stock Inspection Commissioners shall be entitled to said livestock, subject to the lien for damage sustained and cost and care and feeding of the same by the person taking such livestock into custody. This lien means your documented care expenses must be satisfied before the animal can be released to its owner or transferred to the Board.
Keep detailed records of every cost you incur: hay, grain, water, bedding, veterinary visits, and any labor associated with the animal’s care. These records support your lien claim and protect you if a dispute arises over what you are owed. The statute does not specify a daily rate — it simply recognizes the lien — so documentation is the only way to establish the actual amount.
Common Mistake: Many people assume they can recover care costs informally. Colorado’s lien framework requires that your expenses be documented and asserted through the proper legal channel. Verbal agreements with an owner are difficult to enforce if they later dispute the amount.
You also have a duty to provide adequate care for the animal’s welfare while it is in your custody. Neglecting an estray you have taken in could expose you to liability under Colorado’s animal protection statutes. For background on how the state approaches animal welfare enforcement, see Colorado’s animal cruelty laws.
If the animal causes damage to your property — broken fences, destroyed crops, or injured other animals — those damages are also recognized under the statute. Such person shall deliver the same to the owner thereof whenever such owner furnishes the person so damaged by such livestock a bond in double the amount of the damage claimed, executed by two responsible persons, said bond to be satisfactory to such damaged party or approved by a county judge or district judge of such county, conditioned upon the payment to the person taking custody of such livestock all damages and costs, if any such damages or costs are awarded.
How Livestock Owners Can Reclaim an Estray in Colorado
If your animal has gone missing and you believe it may have been taken in as an estray, Colorado law gives you a path to reclaim it — but that path has conditions. You cannot simply show up and take the animal back without satisfying the legal obligations that attached when someone else took custody.
The reclaim process generally works like this:
- Establish proof of ownership. Brand registration records, purchase receipts, veterinary records, photographs, and ear tag documentation all serve as evidence. The State Board of Stock Inspection Commissioners can cross-reference registered brands to help confirm identity.
- Satisfy the caretaker’s lien. You must cover the documented costs of care and feeding incurred by the person holding your animal. If you dispute the amount, the statute provides for arbitration.
- Post a bond if damage is claimed. If the person holding your animal claims property damage, you may be required to post a bond in double the claimed damage amount before the animal is released to you.
- Coordinate with the Board. If the Board has already taken formal custody of the animal as an estray, you work through the Board’s process to reclaim it.
Acting quickly matters. In the event the owner of such livestock cannot be found within ten days after the date of the publication of the notice, the livestock shall be an estray and the State Board of Stock Inspection Commissioners shall be entitled to said livestock. Once that ten-day window closes after publication, the Board’s authority over the animal becomes formal. Reclaiming after that point requires working through the Board rather than directly with the person who found the animal.
If you run livestock in Colorado, maintaining current brand registration and keeping records accessible can make the difference between a quick reclaim and a prolonged legal process. You may also want to familiarize yourself with Colorado’s livestock transportation regulations, since a missing animal may have been moved across county lines before being found. For those who raise goats or smaller livestock, Colorado’s goat ownership laws provide additional context on how the state regulates small-scale livestock keeping.
Pro Tip: Register your livestock brands with the Colorado Department of Agriculture and photograph your animals with identifying marks visible at least once a year. If an animal goes missing, you will need that documentation to move quickly through the reclaim process.
What Happens When an Estray Goes Unclaimed in Colorado
When no owner comes forward after the required notice period, Colorado law does not leave the animal in legal limbo. The State Board of Stock Inspection Commissioners takes formal authority and moves the animal toward disposition — typically through sale.
All moneys coming into the hands of the Board from the sale of estray animals shall constitute and be known as the estray fund, which fund is hereby created and continuously appropriated to the Board, and shall be kept in an account separate and distinct from other accounts, in conformity with rules to be prescribed by said Board. The proceeds from any sale do not disappear — they are held in trust for the original owner.
The estray fund is an escrow fund that the Board shall keep in trust for the owner of the estray animal for six years after the date the proceeds from the sale of the animal were deposited in the fund. This means that even after your animal has been sold, you have a six-year window to come forward and claim the net proceeds — after costs are deducted.
For lower-value animals, a slightly different process applies. In cases where such livestock are horses, mules, or burros of inferior quality and of the apparent value of less than thirty-five dollars per head and the owner or any other person in interest cannot be found after reasonable search and inquiry, the State Board of Stock Inspection Commissioners, or its duly authorized representative, after posting of notice at a conspicuous place at the courthouse of the county where such livestock are found for a period of ten days, may sell such livestock at private or public sale as stated in said notice, and the proceeds of such sale remaining after the payment of all reasonable costs shall be held for the owner or other person in interest when found as is provided by law for estray funds.
The following table summarizes the key timelines and outcomes under Colorado’s estray process:
| Stage | Timeframe | Who Acts | Outcome |
|---|---|---|---|
| Written notice to known owner | Within 5 days of taking custody | Person holding the animal | Owner notified; reclaim process begins |
| Published notice (unknown owner) | Within 1 week of taking custody | Person holding the animal | Public notice triggers 10-day window |
| Board takes formal authority | 10 days after publication | State Board of Stock Inspection Commissioners | Animal formally classified as estray |
| Sale of unclaimed animal | After Board authority established | State Board of Stock Inspection Commissioners | Proceeds deposited into estray fund |
| Owner claims sale proceeds | Up to 6 years from deposit | Original owner | Net proceeds returned after costs |
It is also worth knowing that allowing livestock to run at large is a separate offense under Colorado law. Any person who knowingly permits any of said animals to run at large is guilty of a misdemeanor and, upon conviction thereof, shall be punished by a fine of not less than twenty-five dollars nor more than five hundred dollars. Owners who are found responsible for an animal’s escape may face those penalties in addition to the costs of the estray process.
Colorado’s estray statutes sit within a broader web of livestock and animal law. If you manage animals in the state, it is worth understanding related rules that may intersect with estray situations — including Colorado’s roadkill laws for animals struck on highways, wildlife removal laws for situations involving non-livestock species, and beekeeping regulations if you keep other agricultural animals on your property. For those dealing with livestock-adjacent animals like backyard poultry, Colorado’s backyard chicken laws and rooster ownership rules provide useful context on how the state balances agricultural use with community standards.
Estray law in Colorado is specific, time-sensitive, and carries real legal consequences for anyone who handles a stray animal incorrectly. Whether you found the animal or lost it, following the statutory process from the start is the most straightforward way to protect yourself and ensure the animal is treated fairly under the law.