Livestock Ear Tag Requirements in Oklahoma: What Every Producer Needs to Know

If you run cattle, sheep, goats, or swine in Oklahoma, ear tag compliance is no longer something you can figure out at the sale barn gate. Federal and state rules have tightened considerably, and a major shift took effect in November 2024 that changed which tags count as official identification for animals crossing state lines.

Whether you move a handful of cows to a neighbor’s pasture or haul a full load to a regional auction, knowing the correct tag type, placement, and paperwork requirements protects your operation from fines, confiscation, and loss of selling privileges. This guide walks you through every layer of Oklahoma’s livestock ear tag requirements — from which species need tags to where you can get them and how long you must keep records.

Which Animals Require Official Ear Tags in Oklahoma

Not every animal on your Oklahoma operation needs an official government-issued ear tag. The requirement kicks in when specific classes of livestock move interstate or enter regulated commerce — but understanding exactly which animals fall into those classes prevents costly surprises.

Under federal animal disease traceability regulations, the species covered include cattle and bison (sexually intact animals 18 months of age or older, all female dairy cattle of any age, male dairy cattle born after March 11, 2013, and cattle or bison of any age used for rodeo, recreational events, shows, or exhibitions), as well as sheep and goats, swine, horses and other equids, and captive cervids such as deer and elk.

It is important to recognize that the federal rule change does not require mandatory tagging of all cattle. The rule only moves USDA official identification tags from the old metal option to electronic identification (EID) tags. Put plainly: if your beef steers are staying on your farm and heading directly to a USDA-inspected slaughter plant without changing ownership, official ear tags are generally not required for that movement.

Cattle and bison are exempted from official identification requirements if they are going directly to slaughter, according to the USDA rule. However, once an animal enters a sale barn, changes ownership, or crosses a state line for any other reason, the rules apply in full.

Pro Tip: When in doubt about whether a specific animal or movement requires official ID, contact the Oklahoma Department of Agriculture, Food and Forestry (ODAFF) Animal Industry Services division at ag.ok.gov before loading the trailer — not after.

Federal RFID Ear Tag Rule: What Changed in November 2024

The single biggest shift in livestock identification in a generation took effect on November 5, 2024. If you applied ear tags before that date, your situation is different from producers tagging animals today — and understanding the dividing line matters.

USDA APHIS amended the animal disease traceability regulations to require that eartags applied on or after 180 days after publication of the final rule in the Federal Register must be both visually and electronically readable in order to be recognized as official eartags for interstate movement of cattle and bison covered under the regulations. USDA published the final rule on May 9, 2024, making the effective date November 5, 2024.

A USDA rule requiring newly applied cattle and bison official ID tags to have both a visual and electronic component went into effect on November 5, 2024. Currently, the only official tags that meet these requirements are 840 RFID tags.

Cattle tagged with a metal tag or a plastic, non-RFID official identification tag prior to that date will be grandfathered in. Cattle tagged with visual-only official tags prior to November 5, 2024, do not need to be retagged unless they lose their ID. That grandfathering provision applies for the life of the animal — so a cow that had a metal NUES tag in her ear before the deadline remains legally identified.

This RFID requirement applies to official identification placed for any reason, including interstate movement, brucellosis vaccination, and tuberculosis testing.

Approved tags must be tamper-resistant, have a high retention rate of at least 99%, and start with the three numbers 840 — the ISO country code for the United States. Tags using a 900 series will not be recognized as official, even if electronically readable.

Important Note: The November 2024 rule applies specifically to cattle and bison. Sheep, goats, swine, equids, and cervids continue to follow their own species-specific identification programs, which have not been replaced by the 840 RFID mandate.

Official 840 RFID Ear Tag Requirements in Oklahoma

Now that visual-only metal tags no longer qualify as official identification for newly tagged cattle and bison in Oklahoma, you need to understand exactly what an 840 RFID tag is and what it must do to count.

Official USDA EID tags are 15-digit, usually round or button-style tags that begin with the digits 840. EID tags can be read visually and with electronic readers. The number “840” is the country code for the United States. After the 840, these tags carry 12 additional numbers unique to that animal.

USDA 840 tags are only developed by authorized manufacturers and carry a unique Animal Identification Number (AIN) that begins with the prefix 840. These tags display the USDA shield emblem and an “Unlawful to Remove” imprint. Removing or tampering with an official tag is a federal violation — treat them accordingly.

There are two main RFID technology formats you will encounter when ordering 840 tags:

• HDX (Half Duplex): HDX tags utilize half duplex technology that can be read from a greater distance and are beneficial for automated systems.
• FDX (Full Duplex): FDX tags utilize full duplex technology and are a cost-effective option.

Animal Identification Numbers (AINs) can only be distributed to a premise or entity that has either a Premises Identification Number (PIN) or a Location Identifier (LID). Distributors of electronic AINs are also obligated to keep records and verify the accuracy of the PIN or LID before handing out tags. To reiterate, you must have a PIN or LID to purchase official electronic animal identification tags. PINs have 7 digits; LIDs can have 6, 7, or 8 digits.

If you do not yet have a Premises ID for your Oklahoma operation, contact ODAFF Animal Industry Services at ag.ok.gov to register your premises before ordering tags. This step is non-negotiable — no PIN or LID, no legal access to 840 RFID tags.

You can also learn more about compliant trailers and transport requirements for Oklahoma livestock in this guide to livestock trailer requirements in Oklahoma and the broader overview of transporting livestock laws in Oklahoma.

Species-Specific Ear Tag Rules in Oklahoma

The November 2024 RFID mandate applies only to cattle and bison. Every other livestock species follows a separate identification framework. Here is how each species breaks down for Oklahoma producers.

Cattle and Bison

The federal rule specifies that ear tags for all sexually intact cattle and bison 18 months of age or older, all dairy cattle, cattle and bison of any age used for rodeo or recreation events, and cattle or bison of any age used for shows or exhibitions must be both visually and electronically readable in order to be recognized as official identification for interstate movement. As noted above, animals heading directly to a USDA-recognized slaughter facility are generally exempt from this requirement.

Sheep and Goats

Sheep and goats fall under the National Scrapie Eradication Program, which has its own mandatory identification structure separate from the 840 RFID cattle rule. All sheep over 18 months of age, sexually intact sheep under 18 months of age that are sold for breeding or exhibition, sheep sold unrestricted, sheep not in slaughter channels, and sheep that have lambed or are pregnant require official identification. Sexually intact goats not in slaughter channels of any age that do not meet the requirements to be considered low-risk commercial goats — such as those that are registered or sold for commercial milk production — also require official identification.

Producers and others who handle sheep or goats in commerce may purchase official plastic, metal, or radio-frequency identification (RFID) tags directly from approved tag manufacturers. A flock or premises ID is required to order tags from these sources. APHIS-provided scrapie tags are available at no cost through the Oklahoma state veterinarian’s office for eligible producers.

Swine

For interstate movements, all swine must be individually identified with official identification unless the swine are kept as a group. The requirements for group shipment of swine are explained in CFR Part 71.19. Swine moving within a single production system under an approved swine production health plan may qualify for an exemption from individual identification — contact ODAFF for details on whether your operation qualifies.

Equids

Horses and other equids moving interstate must be officially identified prior to the interstate movement, using an official identification device or method, unless they are used as the mode of transportation (such as horseback or horse and buggy) for travel to another location and return directly to the original location, or they are moved from the farm or stable for veterinary medical examination or treatment and returned to the same location without change in ownership.

Cervids

Import permits are required for cervids entering Oklahoma. Captive deer and elk operations in Oklahoma must also comply with the Oklahoma Department of Agriculture’s cervid import permit requirements and TB testing standards. All cervids are required to meet TB testing standards. Contact ODAFF Animal Industry Services before moving any captive cervid across state lines into or out of Oklahoma.

Species	Identification Program	Tag Type Required (Interstate)	Premises ID Required?
Cattle & Bison (covered classes)	USDA ADT / 9 CFR Part 86	840 RFID (applied after Nov. 5, 2024)	Yes (PIN or LID)
Sheep	National Scrapie Eradication Program	Official scrapie tag (plastic, metal, or RFID)	Yes (flock or premises ID)
Goats	National Scrapie Eradication Program	Official scrapie tag	Yes (flock or premises ID)
Swine	9 CFR Part 71.19	Individual or group ID (PIN tag for slaughter)	Yes
Equids	9 CFR Part 86	Official ID device or method	Varies
Captive Cervids	9 CFR Part 77 / ODAFF	Official ID per Part 77 + import permit	Yes

Where to Get Official Ear Tags in Oklahoma

Getting the right tags into your hands before you need them — not the morning of a sale — is one of the most practical steps you can take to stay compliant. Oklahoma producers have several reliable channels.

Through the Oklahoma Department of Agriculture

The ODAFF Animal Industry Services division is your first call. Many state veterinarian offices distribute free 840 RFID tags to producers, but supply has been uneven. Contact ODAFF directly at ag.ok.gov to check current availability of subsidized tags for Oklahoma operations. Having your Premises ID ready when you call speeds up the process significantly.

Through Accredited Veterinarians

Producers can purchase tags from approved manufacturers directly or check with their veterinarian to see if they have a supply of RFID tags. Your herd veterinarian is especially useful for brucellosis vaccination tags, which must be applied by a licensed veterinarian anyway. Building that relationship before you need tags in a hurry pays off.

Through Authorized Manufacturers and Distributors

Three major manufacturers produce approved 840 tags: Allflex (Dallas, TX), Datamars (Temple, TX), and Y-Tex (Cody, WY). Tags are available through veterinary supply distributors, farm supply stores, and directly from manufacturers. Online livestock supply retailers such as Valley Vet Supply and LivestockTags.com also carry a full range of approved 840 RFID tags and applicators.

A Premises ID is required to purchase USDA tags. When ordering online or through a distributor, have your PIN or LID number ready — the seller is legally required to verify it before completing the transaction.

Cost and Federal Funding

RFID 840 tags cost between $2 and $5 per tag, depending on the manufacturer, tag style, and order quantity. Congress allocated $15 million in the March 2024 Consolidated Appropriations Act specifically for EID tags. Ask your state veterinarian’s office whether any of that funding is still accessible for Oklahoma producers — free or subsidized tags reduce your per-head cost significantly.

How and When to Apply Ear Tags in Oklahoma

Buying the right tags is only half the job. Applying them correctly — in the right ear, at the right time, with the right equipment — determines whether they stay in place and scan reliably when it matters most.

Placement

RFID tags are recommended to be placed in the left ear. This is a USDA recommendation, not a hard legal requirement, but following it keeps your animals consistent with national standards and makes scanning faster at sale barns and border crossings. For brucellosis vaccination tags specifically, the new official brucellosis identification is an orange RFID button, placed in the right ear by the herd veterinarian at the time of vaccination.

Tag Options and Applicators

You have two main hardware configurations to choose from when tagging cattle with 840 RFID devices:

• All-in-One Tags: All-in-one livestock tags combine an EID button tag and a visual tag. These are ideal if you need the benefits of an EID tag and a visual tag but want the set to take only one spot in the ear.
• Matched Pairs: Matched pair livestock tags are sets that include a visual tag and an electronic ID tag. The EID number is printed on both tags, which helps in the event that one tag is lost from the animal’s ear — there is still another form of identification.

Each manufacturer supplies a compatible applicator designed for their specific tag style. Never use a mismatched applicator — improper installation causes tag loss, tissue damage, and failed scans. Order the applicator at the same time as your tags.

Timing

Tag cattle before they leave your premises for any regulated movement. Do not wait until the sale barn or the state line. The RFID requirement applies to official identification placed for any reason, including interstate movement, brucellosis vaccination, and tuberculosis testing — so the tag goes in at the point of the triggering event, not after the fact.

Pro Tip: Keep a spare supply of approved 840 RFID tags and a working applicator on hand at all times. Running out of tags the day before a scheduled sale is a preventable problem that can cost you far more than the tags themselves.

Ear Tag Requirements for Interstate Movement in Oklahoma

Moving livestock across Oklahoma’s borders — whether you are shipping cattle to Kansas, hauling sheep to Texas, or bringing horses in from Colorado — triggers a specific set of identification and documentation requirements that go beyond the ear tag itself.

USDA APHIS amended the animal disease traceability regulations to require that eartags applied on or after the effective date be both visually and electronically readable in order to be recognized for use as official eartags for interstate movement of cattle and bison covered under the regulations.

For cattle moving out of or into Oklahoma, you will generally need:

1. Official 840 RFID Ear Tag — applied before movement, as described above.
2. Interstate Certificate of Veterinary Inspection (ICVI or CVI) — issued by an accredited veterinarian within 30 days of entry. CVIs shall always be received within 30 days of entry; there shall be only one state of destination on a CVI, though there may be more than one destination city within the same state on a single CVI.
3. Disease Testing — varies by species and origin state. For example, bulls 18 months and older entering Oklahoma need a negative Trichomoniasis test within 60 days and no exposure to female cattle after the test.

Oklahoma’s import requirements are updated regularly. Individual ID by official ear tag includes a USDA tag, RFID tag, microchip, or breed registration tattoo (with a copy of registration papers accompanying the animal). Always check the current ODAFF Animal Import Requirements document before shipping, as requirements are revised periodically — the version cited here was revised as of April 1, 2025.

Producers in neighboring states moving animals into Oklahoma should also review their home state’s trailer and transport compliance. See the guides for livestock trailer requirements in Kansas, livestock trailer requirements in Missouri, livestock trailer requirements in Colorado, and livestock trailer requirements in Texas for state-by-state details.

Important Note: Canadian-origin cattle carry their own official ID tags. Canadian and Mexican ID tags are considered official IDs and are unlawful to remove. Do not replace or add a US ID tag to a Canadian-origin animal unless directed by ODAFF or USDA APHIS staff.

Recordkeeping Requirements for Ear-Tagged Animals in Oklahoma

Tagging and moving animals correctly is only part of your compliance obligation. Federal regulations under 9 CFR Part 86 require that specific records be created, maintained, and made available for inspection — and the retention periods differ by species.

How Long You Must Keep Records

For poultry and swine, interstate movement documents must be kept for at least 2 years. For cattle and bison, sheep and goats, cervids, and equine species, the retention period is 5 years. The longer retention period for cattle reflects the long latency periods of diseases like tuberculosis and bovine spongiform encephalopathy, which may not appear until years after an animal was officially identified.

What Records to Keep

Any state, tribe, accredited veterinarian, or other person or entity who distributes official identification devices must maintain for 5 years a record of the names and addresses of anyone to whom the devices were distributed. As a producer, your key records include:

• The AIN (840 tag number) of each tagged animal, linked to your Premises ID
• Copies of all ICVIs or owner-shipper statements used for interstate movements
• Any disease test results (Trich, TB, Brucellosis) associated with moved animals
• Records of tag distribution if you receive tags from a state or veterinarian and redistribute them within your operation

All records of 840 tags sold or handed out by anyone — a manufacturer, reseller, accredited veterinarian, animal health official, or AIN Device Manager — must be reported to the AIMS database by the person possessing the device when distributing it to the next individual. As the end-user producer, your obligation is to keep your own farm records and make them available to state or federal animal health officials upon request.

Electronic vs. Paper Records

Electronic interstate certificates of veterinary inspection (ICVIs) are readily available and frequently used. USDA APHIS clarified that electronic ICVIs may be used as an alternative to paper ICVIs. Digital recordkeeping — whether through herd management software or a simple spreadsheet — satisfies the requirement as long as records are complete, accurate, and accessible for the full retention period.

For Oklahoma-specific guidance on recordkeeping systems and AIMS database entry, contact ODAFF Animal Industry Services or your USDA APHIS Veterinary Services area office. You can also review the full text of 9 CFR Part 86 at eCFR.gov for the complete regulatory language.

Staying current on tag and transport rules across multiple states is easier when you have the right reference material. Producers who move animals through the region regularly may also find these guides useful: livestock trailer requirements in Louisiana, livestock trailer requirements in Tennessee, and livestock trailer requirements in Mississippi.

Keeping Your Operation Compliant

Oklahoma livestock producers now operate under a clearer — but more demanding — identification framework than existed just a few years ago. The November 2024 federal rule eliminated visual-only metal tags as official ID for newly tagged cattle and bison, making 840 RFID tags the standard for any covered animal that will move interstate, enter a sale barn, or participate in a disease program.

Your action checklist comes down to four things: register your premises to get a PIN or LID, order approved 840 RFID tags before you need them, apply tags correctly before any regulated movement, and keep your ICVIs and tag records for the full retention period required by species. Sheep and goat producers should verify their scrapie program compliance separately, and swine producers should confirm individual or group ID requirements with ODAFF before moving animals across state lines.

The USDA APHIS Official Eartags Criteria and Options document (updated January 31, 2025) and the NCBA’s producer FAQ on the 2024 Cattle Traceability Rule are two of the most practical reference documents available. Keep them bookmarked and review them any time you have a question about whether a specific tag or movement qualifies under current rules.