Livestock Microchipping Laws in Louisiana: What Producers Need to Know

If you raise cattle, horses, sheep, goats, or swine in Louisiana, the rules around electronic identification have changed significantly in recent years — and confusing a subcutaneous microchip with an RFID ear tag can cost you a shipment, a sale, or a clean health certificate. The Louisiana Department of Agriculture and Forestry (LDAF) enforces identification requirements that blend state-level rules with a federal framework that was overhauled as recently as November 2024.

This guide walks you through exactly what counts as official ID in Louisiana, which species can use an injectable microchip, when that chip satisfies interstate movement requirements, and how to get your premises registered so you can legally purchase and apply official tags or chips. Whether you’re moving a single horse to a cutting competition or shipping a pen of beef cattle across state lines, knowing these rules before loading day matters.

Microchipping vs. RFID Ear Tags: What Counts as Official ID in Louisiana

The terms “microchip” and “RFID” are often used interchangeably in casual conversation, but they describe different physical devices with different regulatory roles in Louisiana livestock identification. Understanding the distinction is the first step to staying compliant.

A microchip implant is an identifying integrated circuit placed under the skin of an animal. The chip uses passive radio-frequency identification (RFID) technology and is also known as a PIT (passive integrated transponder) tag. In livestock management, however, externally attached microchips such as RFID ear tags are commonly used to identify farm and ranch animals, with the exception of horses. So while both devices use RFID technology, their form factor — and their legal standing — differ by species.

For most cattle and bison moving interstate, the official device is an RFID ear tag, not an injectable chip. The updated Animal Disease Traceability (ADT) regulations, effective November 5, 2024, require that cattle tags applied after that date be both visually and electronically readable (RFID). An injectable microchip does not satisfy this requirement for cattle unless it is a USDA-approved 840-series implantable transponder applied in a species for which that format is authorized.

For horses and certain small ruminants, the calculus is different. The Louisiana Department of Agriculture and Forestry issued a regulation as far back as 1994 requiring permanent identification — in the form of a brand, lip tattoo, or electronic identification — of all horses tested for equine infectious anemia. The original NAIS plan called for individual animals to be marked with NAIS-compliant RFID tags or implantable microchips. That dual-format approach still shapes how Louisiana treats equine ID today.

Pro Tip: When your paperwork says “electronic identification,” confirm whether the receiving state or market requires an ear tag or will also accept an injectable chip. Louisiana’s LDAF Office of Veterinary Health can clarify at [email protected] or 225-925-3980.

The Federal RFID Mandate and What It Means for Louisiana Producers

The federal rule that most directly affects Louisiana cattle and bison producers is the USDA APHIS final rule published April 26, 2024, and effective November 5, 2024. APHIS amended the animal disease traceability regulations to require that ear tags applied on or after a date 180 days after publication be both visually and electronically readable in order to be recognized as official ear tags for interstate movement of cattle and bison covered under the regulations.

The types of cattle required to be identified when moving interstate remain unchanged. The list includes dairy cattle, sexually intact beef cattle 18 months or older, and rodeo and exhibition cattle. What changed is the tag itself: a plain metal clip tag applied after November 5, 2024 no longer qualifies as official identification for those animals.

Official metal tags that conform to the National Uniform Eartagging System and were applied before the November 5, 2024, deadline will continue to be accepted. If your animal already had a grandfathered metal tag in its ear on that date, you do not need to add an RFID tag — that animal is considered officially identified for life under the existing tag.

Louisiana participates in the federal ADT cooperative program. All producers can purchase 840 EID tags and applications directly from a tag distributor. To purchase 840 tags, you must have a premises ID number assigned. Accredited veterinarians can receive no-cost EID tags from the Department of Veterinary Health. The LDAF’s Office of Veterinary Health coordinates tag distribution for Louisiana producers, so your first call if you need tags or a premises number is to that office.

One important carve-out: cattle and bison are exempted from official identification requirements if they are going directly to slaughter. If your animals move straight to a USDA-recognized slaughter facility, a USDA backtag is sufficient and no 840 RFID ear tag is required. This exemption does not apply to animals that stop at a sale barn or are commingled with other cattle before slaughter.

For a broader look at what Louisiana law requires when you move animals across parish or state lines, see this guide on transporting livestock laws in Louisiana.

Important Note: A federal lawsuit was filed against the November 2024 RFID rule shortly before it took effect. As of June 2026, producers should verify current enforcement status with LDAF or USDA APHIS, as litigation could affect implementation timelines.

Which Livestock Can Use a Microchip as Official Identification in Louisiana

Not every species in your operation is subject to the same identification format. Louisiana follows the federal ADT framework, which designates specific approved devices by species. Whether an injectable microchip qualifies as official ID depends entirely on the animal you’re tagging.

Horses and equines have the clearest path to microchip-as-official-ID. The LDAF issued a regulation requiring permanent identification — in the form of a brand, lip tattoo, or electronic identification — of all horses tested for equine infectious anemia (EIA). According to the LDAF and the state veterinarian, this requirement was “a significant help” in determining the owners of horses displaced during Hurricane Katrina. Injectable 840-series transponders are USDA-approved official identification devices for equines and are the industry standard for horses moving interstate.

Sheep and goats can use injectable 840-series microchips as official identification under the USDA Scrapie Eradication program. The 840-ID Microchip is an officially approved microchip. Additionally, the FDA’s Center for Veterinary Medicine also approved the 840-ID Microchip for use in sheep and goats. Scrapie tags are official identification tags used for sheep and goats and are part of the USDA Scrapie Eradication programs. This is a form of permanent identification that helps animal health officials trace animals’ movements to prevent the spread of scrapie.

Cattle and bison moving interstate must use an RFID ear tag — not an injectable chip — as their primary official identification under the November 2024 rule. The injectable 840 transponder is not approved as a substitute for the ear tag requirement for these species in interstate commerce.

Swine have their own identification framework. APHIS is offering no-cost radio frequency identification (RFID) ear tags to eligible swine producers. While RFID ear tags are the standard for swine moving interstate, producers should contact LDAF’s Office of Veterinary Health to confirm which specific devices are accepted for Louisiana-origin swine.

If you also raise backyard poultry or goats on your Louisiana property, the backyard chicken laws in Louisiana and goat ownership laws in Louisiana pages cover additional permitting and health requirements that apply alongside identification rules.

When a Microchip Qualifies for Interstate Movement in Louisiana

Moving livestock across state lines from Louisiana triggers both federal ADT requirements and the destination state’s import rules. A microchip qualifies for interstate movement only when it meets all of the following conditions simultaneously.

• The chip is a USDA-approved 840-series device bearing the U.S. country code (840) as the first three digits of its 15-digit number.
• The species is one for which an injectable transponder is an approved official ID format — primarily equines, sheep, goats, and certain cervids.
• The chip number is recorded on the Interstate Certificate of Veterinary Inspection (ICVI) issued by an accredited veterinarian before movement.
• Your premises has an active Premises Identification Number (PIN) linked to the chip’s AIN in the federal system.
• The receiving state accepts the injectable chip format for that species — some states have additional requirements beyond the federal floor.

The movement of animals across state lines necessitates official identification to effectively manage and contain disease outbreaks impacting livestock. Accurate and timely movement data is critical for minimizing the size and scope of these events. Louisiana livestock brought into other states must be accompanied by an official health certificate, and the identification number on that certificate must match the chip or tag on the animal.

For cattle and bison specifically, cattle and bison may be moved interstate without official identification if they are moved directly to a recognized slaughtering establishment or directly to no more than one approved livestock facility and then directly to a recognized slaughtering establishment. Outside of that narrow slaughter-direct pathway, official electronic ID is required.

Producers shipping into neighboring states should review those states’ specific entry requirements. Related guides on transporting livestock laws in Texas and transporting livestock laws in Mississippi are useful starting points, though you should always confirm current import requirements with the destination state’s animal health office before loading.

See also the transporting livestock laws in Florida and transporting livestock laws in Oklahoma pages if you ship to those markets regularly.

Approved Microchip Standards and Placement by Species in Louisiana

Louisiana follows USDA APHIS’s Official Animal Identification Device Standards (OAIDS), which specify not just which chip formats are approved but also the technical standards those chips must meet and where on the animal they should be placed.

Approved devices for EIDs include 134.2 kHz LF RFID tags compliant with both the 11784 and 11785 ISO standards, or UHF RFID tags. For injectable transponders used in horses and small ruminants, the same ISO 11784/11785 standard applies. For low-frequency EID ear tags, testing must complete Procedure 5 of Section 10 of ICAR Guidelines for Testing of External RFID devices. All low-frequency EID ear tags must conform with ISO standards 11784/11785.

All official 840-series chips and tags carry a 15-digit Animal Identification Number. USDA tags have a unique 15-digit number starting with “840,” display the USDA shield emblem, and print “Unlawful to Remove.” An injectable chip that does not carry the 840 prefix and conform to ISO standards is not an official USDA identification device, regardless of whether it can be scanned by an RFID reader.

Placement standards by species, per USDA APHIS guidance:

• Cattle and bison: RFID ear tag placed in the left ear is the recommended placement per USDA guidance. Injectable transponders are not the approved format for official interstate ID in this species.
• Horses and equines: Injectable 840 transponder implanted in the nuchal ligament area of the neck (left side, mid-neck) is the industry-standard placement accepted by most states and equine registries.
• Sheep and goats: The 840-ID Official Microchip can be used in all equines, goats, sheep, alpaca, llama, elk, whitetail and other deer. Injectable transponders for small ruminants are typically placed in the left ear base or the neck, depending on the manufacturer’s protocol and the accredited veterinarian’s preference.
• Swine: RFID ear tags are the standard format; injectable chips are generally not used as primary official ID for swine in interstate commerce.

Pro Tip: Always have an accredited veterinarian implant injectable transponders in horses and small ruminants. The American Veterinary Medical Association’s policy states that microchip implantation is a veterinary procedure and should be performed by or under the supervision of a licensed veterinarian.

For producers also managing bees or other specialty livestock on the same property, the beekeeping laws in Louisiana page covers registration and inspection requirements that run parallel to livestock ID programs.

Registering a Livestock Microchip in Louisiana

Owning an approved chip is only half the equation. For a microchip to function as official identification in Louisiana, it must be linked to a registered premises and recorded in the appropriate federal or state database. Here is how that process works step by step.

1. Obtain a Premises Identification Number (PIN). A premises identification number (PIN) or location identifier (LID) is a unique code permanently assigned to a physical location and is required to purchase official animal identification tags. Each state administers PIN or LID registration. In Louisiana, PIN registration is handled through the LDAF Office of Veterinary Health. Contact [email protected] or call 225-925-3980 to begin the process.
2. For sheep and goats, also obtain a Scrapie Flock ID. To use 840-series chips, you must have a Premises ID. If you raise goats or sheep, you must also have a Flock/Scrapie ID. The Scrapie Flock ID is issued through USDA APHIS and must be linked to your PIN in the National Scrapie Database before you can order 840 chips for small ruminants.
3. Order approved 840-series chips or tags. All producers can purchase 840 EID tags and applications directly from a tag distributor. You will need your PIN to complete the order. Accredited veterinarians in Louisiana can receive no-cost EID tags directly from the LDAF Department of Veterinary Health.
4. Have the chip implanted and record the AIN. An accredited veterinarian implants the chip and records the 15-digit AIN against your animal’s description and your PIN. This record ties the chip number to your premises in the federal Animal Identification Number Management System (AIMS).
5. Ensure the AIN appears on all health certificates. When your animal moves — whether to a sale barn, a show, or across state lines — the chip’s AIN must appear on the Interstate Certificate of Veterinary Inspection (ICVI). GlobalVetLink’s digital Certificates of Veterinary Inspection fully support electronic ID tags, making it easy to record and track animal movements with accurate and secure documentation.

The USDA has documented that electronically recorded ID and movement data can drastically reduce the time needed to locate an animal among millions of data points to under an hour. In contrast, relying on paper records can result in delays of days, weeks, or even months. Keeping your chip registrations current is not just a compliance exercise — it is your fastest path to resolving a disease investigation or a theft dispute.

Louisiana producers interested in the LDAF’s broader animal identification and branding programs can find additional context on the LDAF animal branding and tattoos page.

Microchipping as Proof of Ownership in Louisiana

Beyond disease traceability, a registered microchip serves a practical ownership function in Louisiana — one the LDAF has actively promoted through programs like its Livestock Brand Commission.

The LDAF’s Livestock Brand Commission has extended its microchipping programs beyond animals to high-value agricultural property. The LDAF’s Livestock Brand Commission reimplemented its saddle identification program, and the first event was such a success they planned additional events. As Commissioner Mike Strain noted, the identification method proves invaluable if property is ever stolen, allowing Brand Officers to confirm ownership and return the property. The same logic applies directly to livestock: a chip tied to your PIN and your name in the LDAF system gives law enforcement a clear chain of custody that a brand or ear tag alone may not provide after a tag is removed.

In a theft or dispute scenario, the chip’s AIN in the federal AIMS database links directly to the premises where it was ordered and the producer who registered it. Once an animal is injected with the chip, it can be identified throughout its life by this one-of-a-kind number. That identification cannot be lost, altered, or intentionally removed. This permanence is what makes an injectable microchip more defensible as proof of ownership than an ear tag, which can be cut out.

Louisiana’s Livestock Brand Commission also registers brands and tattoos, and those marks can work alongside a microchip to create a layered ownership record. If you operate in a parish where cattle theft is a concern, combining an LDAF-registered brand with a 840-series injectable chip gives you both a visible deterrent and a tamper-proof electronic record.

For related animal law topics in Louisiana, the following guides cover overlapping ownership and identification issues:

• Rooster laws in Louisiana
• Pit bull laws in Louisiana
• Leash laws in Louisiana
• Neighbor’s cat in my yard laws in Louisiana

Key Takeaways for Louisiana Livestock Producers

Louisiana livestock identification law sits at the intersection of state LDAF rules and the federal ADT framework that USDA APHIS updated in November 2024. The practical rules are straightforward once you know which species you raise and where your animals are going.

• Cattle and bison moving interstate need an 840 RFID ear tag — not an injectable chip — applied after November 5, 2024.
• Horses, sheep, goats, alpacas, llamas, and cervids can use an injectable 840-series microchip as official identification when it meets ISO 11784/11785 standards and is linked to your PIN.
• You must have a Louisiana Premises ID Number before you can legally purchase or apply official 840 tags or chips. Contact LDAF at [email protected] or 225-925-3980.
• Sheep and goat producers also need a Scrapie Flock ID, which must be linked to their PIN in the National Scrapie Database.
• The chip’s AIN must appear on the ICVI for any interstate movement — the chip alone, without documentation, does not satisfy movement requirements.
• A registered microchip provides the strongest proof of ownership in a theft dispute because the number cannot be removed or altered.

If you ship animals to other states regularly, check the destination state’s current import requirements before each movement. Rules in neighboring states like Missouri, Kentucky, North Carolina, South Carolina, Colorado, and Idaho vary, and your ICVI must satisfy both Louisiana’s outbound requirements and the receiving state’s inbound rules. When in doubt, your accredited veterinarian and the LDAF Office of Veterinary Health are your best resources before loading day.