Finding a stray cow, horse, or sheep wandering onto your New Mexico property can feel like an unexpected problem with no obvious answer. You may wonder whether you can simply shoo it away, keep it, or call animal control — but New Mexico law has a specific framework for exactly this situation, and the rules matter.
New Mexico’s estray statutes, found primarily in Chapter 77, Article 13 of the New Mexico Statutes Annotated (NMSA 1978), outline clear responsibilities for anyone who finds, holds, or claims stray livestock. Whether you are a rural landowner, a neighboring rancher, or someone who simply woke up to an unfamiliar animal in the yard, understanding these rules protects you legally and ensures the animal is handled correctly.
This guide walks you through how New Mexico defines an estray, what you are required to do when you find one, how to report it, what care costs you may incur, and how the reclaim and sale process works.
What Is an Estray and How New Mexico Law Defines It
The term “estray” has a precise legal meaning under New Mexico’s Livestock Code. Under NMSA 1978 Section 77-2-1.1, an “estray” means livestock found running at large upon public or private lands, either fenced or unfenced, whose owner is unknown, or that is branded with a brand that is not on record in the office of the board, or is a freshly branded or marked offspring not with its branded or marked mother, unless other proof of ownership is produced.
This definition is broader than most people expect. An animal does not have to be completely unbranded to qualify as an estray — a brand that simply isn’t registered with the New Mexico Livestock Board (NMLB) is enough to trigger estray status. A young calf separated from its branded mother can also be treated as an estray under the right circumstances.
Under the Livestock Code, “animals” or “livestock” means all domestic or domesticated animals that are used or raised on a farm or ranch, including the carcasses thereof, and exotic animals in captivity — including equines, cattle, sheep, goats, swine, bison, poultry, ostriches, emus, rheas, camelids, and farmed cervidae upon any land in New Mexico. “Animals” or “livestock” does not include canine or feline animals.
One important distinction: wild horses are not livestock under New Mexico law. Wild horses are not livestock — the wild horses on the White Sands Missile Range do not fit within the definition of “livestock,” and therefore the Livestock Board does not have the authority to take possession of and sell them as estrays. If you encounter free-roaming horses on public land, a different set of rules applies. You can also review transporting livestock laws in New Mexico for related context on how identified animals must be handled during movement.
Key Insight: A branded animal is not automatically safe from estray classification. If the brand is not recorded with the New Mexico Livestock Board, the animal can still be treated as an estray under state law.
Your Obligations When You Find Stray Livestock in New Mexico
When stray livestock appears on your land, your legal options — and limits — depend on where the animal is found and what you intend to do with it. New Mexico law draws a clear line between impounding an animal and simply reporting its presence.
A person shall not impound an estray except when the estray is found on property the person owns or controls. This means you cannot go onto someone else’s land, round up a stray, and hold it without legal authority. Your right to physically detain the animal only exists on your own property.
If the estray is on public land, public highways, or grazing land connected to public land, the law gives you a limited option. It is lawful for a person having knowledge of an estray grazing on public land, public highways, or other lands used for grazing purposes in conjunction with public land — and who has the prior approval of or is acting in cooperation with an agent of the board — to impound and detain the estray for the purpose of ascertaining ownership by brand or other means of identification. In other words, you need board approval or active cooperation with an NMLB agent before detaining an animal on public land.
If you do not own the land where the estray is found, your clearest path is to report it rather than hold it. A person having knowledge of an estray upon any public or private range, fenced or unfenced, may notify the director or an inspector, giving a description of the estray, and upon instructions from the board or inspector the estray shall be turned over to an inspector for disposition as the board may direct according to law.
For sheep and goats specifically, the obligation is more immediate. A person finding estray sheep or goats shall immediately report them to an inspector or the director and deliver them to an inspector upon demand. The word “immediately” here signals that delay is not acceptable for small ruminants.
You should also be aware that unbranded livestock carries its own legal risk. Unbranded livestock, except offspring with a branded mother or offspring with a mother properly identified, shall be subject to seizure by a peace officer or livestock inspector and shall be handled and disposed of in the same manner as is provided for the handling and disposal of estrays. If you encounter an unbranded animal, do not assume it is simply a young calf — it may already be subject to estray procedures. See also the state’s rules on goat ownership laws in New Mexico for identification requirements that owners must meet.
How to Report an Estray to Authorities in New Mexico
Reporting a stray animal to the right authority is both a legal obligation and a practical necessity. The agency responsible for estray matters in New Mexico is the New Mexico Livestock Board, which oversees brand inspection, livestock identification, and estray disposition across the state.
When you impound an estray on your own property, the clock starts immediately. When a person impounds an estray, he shall, within five days of the impoundment, notify the director or an inspector of the impoundment. Missing this five-day window is not a minor oversight — failure to notify the board after impounding an estray is a separate violation under NMSA Section 77-13-8.
When you make your report, be prepared to describe the animal in detail. The NMLB will use that description to search brand records and attempt to locate the owner. Useful information to gather includes:
- Species and approximate age or size
- Color and distinguishing markings
- Brand location and symbol, if visible
- Ear tags, tattoos, or freeze marks
- The location where the animal was found
- The date you first observed the animal
To schedule an inspection with a brand inspector or report a livestock welfare incident, the NMLB directs you to its personnel directory, which includes a map of districts and contact information for inspectors in your area. The board’s main phone number is (505) 841-6161, and you can also reach district inspectors directly through the NMLB’s Lost/Found/Estray page.
If an inspector is already conducting a routine inspection and discovers a stray animal mixed in with other livestock, the law gives them independent authority to act. For purposes of that section, an estray is any livestock being driven or shipped from a district or from the state that is not properly identified as required by the Livestock Code, and if an inspector finds an estray in or with the livestock being inspected, the inspector may seize and hold it and dispose of it in the manner provided by law for the disposition of unclaimed livestock.
Pro Tip: When reporting an estray, photograph the brand and ear tags before the animal is moved. Clear images help the NMLB search brand records faster and reduce delays in locating the owner.
Care and Cost Responsibilities While Holding an Estray in New Mexico
Holding a stray animal on your property comes with real costs — feed, water, shelter, and veterinary care if needed. New Mexico law acknowledges this and gives the person who impounds an estray certain rights to seek reimbursement, but those rights are tied directly to following the proper notification procedures.
Upon the impoundment of any estray animal or animals as provided in Section 77-13-2 NMSA 1978, the impounder shall be entitled to hold them lawfully until relieved of their custody by the New Mexico Livestock Board. You are not required to surrender the animal to a claimant simply because someone shows up and says it is theirs — the NMLB must first verify ownership and issue an authorization.
Should the board be satisfied that the applicant is the lawful owner, it shall forthwith issue an order by the director authorizing the impounder to deliver the estray or estrays to the owner, who may be required to pay any reasonable charges incurred by the impounder; provided that in case of a controversy as to what shall constitute a reasonable charge, the New Mexico Livestock Board shall fix the amount, the time of service for which the impounder may claim remuneration, commencing on the date of notification made by the impounder to the New Mexico Livestock Board.
This is an important detail: your right to claim reimbursement for care costs begins on the date you notified the board — not the date you found the animal. If you waited several days before reporting, those early days of care may not be compensable. Notify the board promptly to protect your financial interests.
For trespass situations, the timeline is even tighter. The owner of an estray found to be in trespass shall be allowed forty-eight hours from receipt of notice of impoundment within which to claim the animal and make settlement for trespass damage. If the owner does not act within 48 hours, the animal moves into standard estray disposition procedures.
Any cost charged against trespass livestock will be a lien on the livestock. This means the animal itself serves as collateral for the care expenses you have incurred — the owner cannot simply reclaim it without settling what is owed.
New Mexico is a brand inspection state, and understanding brand registration helps you avoid situations where your own animals could be mistaken for estrays. For related reading on identification and movement rules, see backyard chicken laws in New Mexico and beekeeping laws in New Mexico for context on how the state regulates different types of animal ownership.
How Livestock Owners Can Reclaim an Estray in New Mexico
If your livestock has gone missing and you believe it has been impounded as an estray, acting quickly is essential. The reclaim process involves proving ownership to the New Mexico Livestock Board’s satisfaction, and the window to do so before the animal is sold can be short.
The first step is contacting the NMLB directly. If the mark or brand on the sheep or goat is recorded in the board office, the director shall notify the owner of record and make arrangements to deliver the sheep or goats to the owner of record if he is the actual owner. For cattle and equines, the same brand-record search process applies — the board will check whether your brand is on file and matches the animal in question.
Acceptable forms of proof of ownership under the Livestock Code include:
- A bill of sale properly executed at the time of purchase
- A purchase sheet from a licensed livestock auction market
- A registration certificate from a recognized purebred association
- An inspection certificate executed as a bill of sale and certified by an inspector
If the owner of record no longer owns the sheep or goats, the director shall deliver them to the subsequent purchaser who can prove ownership with a valid bill of sale. In either case, delivery shall be conditioned upon payment by the claimant of all costs incurred in keeping the sheep or goats and such other expenses as may have been necessarily incurred.
Once the NMLB verifies your ownership, it issues a formal release order. Should a claimant for the animal or animals apply to the impounder for possession of the same, the impounder shall at once notify the New Mexico Livestock Board in writing of such application. You cannot simply show up and take the animal — the impounder is legally required to keep it until the board authorizes release.
Owners who fail to keep their livestock properly identified face a difficult reclaim process. A person who has purchased or received or has in possession any livestock shall exhibit the bill of sale for the livestock at the reasonable request of an inspector or other peace officer. A person who fails to produce the bill of sale required or who is unable to exhibit other written evidence of ownership or legal possession is guilty of a misdemeanor. Maintaining current bills of sale and a registered brand is the most effective way to avoid estray classification and speed up any reclaim effort.
Important Note: If you recently purchased livestock and have not yet rebranded it, New Mexico law generally requires rebranding within 30 days of purchase. Keep your bill of sale accessible at all times during that transition period.
For comparison on how neighboring states handle livestock reclaim and transportation documentation, you may find it useful to review transporting livestock laws in Colorado or transporting livestock laws in Oklahoma.
What Happens When an Estray Goes Unclaimed in New Mexico
When no owner comes forward after the required notice period, New Mexico law authorizes the NMLB to sell the animal and distribute the proceeds according to a specific process. The goal is to resolve the animal’s status cleanly and compensate anyone who incurred legitimate costs along the way.
Before a sale can occur, the board must publish notice. Under NMSA Section 77-13-4, when the owner of an impounded estray is unknown, the board is required to publish and post notice describing the animal. If an estray is not claimed within five days after the last publication of notice, it may be sold by the board through an inspector in such manner as the board may direct.
The sale produces a legal title document. The inspector making the sale shall give a bill of sale to the purchaser from the board, signed by the inspector. The bill of sale shall be legal evidence of the ownership of the livestock by the purchaser and shall be a legal title to the livestock. This protects buyers at estray sales from future ownership disputes.
There is also a provision for urgent situations. Where the director determines that it is impractical to publish notice, the estray may be sold immediately without notice. In such case, the board shall publish notice of the proceeds from the sale of the estray in the same manner and for the same length of time as provided for the notice of the sale, and shall hold and distribute the proceeds in the same manner as if the sale were made after notice. This might apply when an animal is injured, ill, or when holding costs are escalating rapidly.
For equines, a separate process applies under amended versions of NMSA 77-13-5. If an estray other than an equine is not claimed within five days after the last publication of notice, it may be sold by the board through an inspector in such manner as the board may direct. Horses, mules, and donkeys are subject to different disposition procedures, reflecting the state’s additional protections for equines.
After the sale, proceeds go back to the board first. The net amount received from the sale of the estray, less the sum prescribed by law for office handling fees, shall be paid to the owner upon proving ownership to the satisfaction of the New Mexico Livestock Board. If a former owner later comes forward with valid proof of ownership, they can still recover the sale proceeds minus the administrative and care costs charged against the animal.
Owners who do not pay trespass charges and reclaim their animals face the same outcome. If the owner does not pay the charges and reclaim possession of the livestock within five days after receipt of notification, the livestock shall be considered unclaimed estrays and may be sold in accordance with the provisions of Section 77-13-5 NMSA 1978.
Key Insight: Even after an estray is sold, the original owner is not necessarily out of options. Proving ownership to the NMLB’s satisfaction after a sale can still result in recovering the net proceeds, minus fees and care costs.
New Mexico’s estray framework reflects the realities of a state with vast open ranges, active ranching communities, and significant public land. The rules are designed to move stray animals through a structured process that protects landowners, compensates those who provide care, and gives original owners a fair window to reclaim their property. Staying familiar with these laws — and keeping your own animals properly branded and documented — is the most reliable way to navigate any estray situation that comes your way.
For more on New Mexico’s animal and livestock regulations, explore related topics such as roadkill laws in New Mexico, leash laws in New Mexico, hunting laws in New Mexico, and kennel zoning laws in New Mexico.