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

If you raise cattle, sheep, goats, swine, or horses in Tennessee, understanding official ear tag requirements is one of the most practical steps you can take to protect your operation. A disease outbreak without a functioning traceability system can mean prolonged quarantines, restricted sales, and significant financial loss — for you and your neighbors.

Tennessee’s ear tag rules draw from both federal Animal Disease Traceability (ADT) regulations and state-level Tennessee Department of Agriculture (TDA) requirements. A major federal rule change took effect on November 5, 2024, shifting the standard for cattle and bison from visual-only metal tags to electronic RFID tags. This guide walks you through every layer of those requirements so you know exactly what tags you need, when to apply them, and how to stay compliant when moving animals across state lines.

Which Animals Require Official Ear Tags in Tennessee

Not every animal on your Tennessee farm requires an official ear tag, but the list is broader than many producers expect. The federal ADT rule requires all livestock — including cattle, equine, sheep and goats, swine, and poultry — being moved interstate to be officially identified, unless specifically exempted. Tennessee follows these federal minimums and adds state-level requirements for intrastate movement and market activity.

For cattle specifically, the trigger points are clear. All sexually intact cattle over 18 months of age moving across state lines must be officially identified and accompanied by an approved document with official ID numbers. Cattle and bison of any age used for rodeo, recreational events, shows, and exhibitions must also be officially identified.

Dairy animals face a stricter standard. All male dairy cattle born after March 11, 2013, and sexually intact dairy cattle of all ages moving across state lines must be officially identified and accompanied by an approved document with official ID numbers. The only exception are dairy steers, which must be officially identified but whose official ID numbers do not have to be individually listed on the approved movement document.

Sheep, goats, and swine each carry their own identification rules, covered in the species-specific section below. The key takeaway: if an animal is leaving your property for a sale barn, exhibition, or another state, there is a strong chance official ID is required before it moves.

Pro Tip: Even if an animal stays within Tennessee its entire life, official ID is still required for entry into approved livestock markets and for certain health programs. Register your premises with TDA before ordering tags — your Premises Identification Number (PIN) is required to purchase official 840 RFID tags.

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. USDA APHIS amended the animal disease traceability regulations to require that eartags applied on or after that date 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.

On November 5, 2024, new federal rules took effect requiring electronic identification (EID) ear tags for certain cattle and bison moving across state lines. The rule, published by USDA APHIS, replaces the old system of visual-only metal tags with radio frequency identification (RFID) tags that can be read electronically.

The rule does not expand which animals need official ID — it changes the type of tag those animals must carry. As USDA-APHIS Area Veterinarian Kevin Petersburg explained, “This doesn’t add any new classes of livestock to what previously required official ID, they just have to have an EID tag now, and it’s for interstate movement only. It’s still all sexually intact cattle and bison 18 months of age or over; all dairy cattle of any age (including dairy-beef cross calves); cattle and bison of any age used for rodeo or recreational events; and cattle and bison of any age used for shows or exhibitions.”

Animals already tagged before the rule’s effective date are not affected. Visual eartags applied to animals prior to November 5, 2024, will be recognized as official eartags for the life of the animal. You do not need to retag any animal that already carries a valid official visual tag applied before that date.

The reasoning behind the change is straightforward. The purpose of this rule is to improve livestock traceability. Electronic identification tags and systems provide many advantages over traditional metal tags, including faster information sharing, more accurate and precise identification of animals, and significantly faster record searches during disease outbreaks.

Important Note: The November 2024 rule applies only to cattle and bison. Sheep, goats, swine, horses, and poultry are governed by separate federal programs and are not subject to the new EID mandate under the same rule.

Official 840 RFID Ear Tag Requirements in Tennessee

When the federal rule says “EID tag,” it means a specific product: the official 840 RFID ear tag. The USDA rule requires newly applied cattle and bison official ID tags to have both a visual and electronic component, and as of the rule’s effective date, the only official tags that meet these requirements are 840 RFID tags.

The number “840” is not a brand — it is the official U.S. country code embedded in the tag’s 15-digit Animal Identification Number (AIN). Official EID tags have a visible 15-digit number starting with 840 printed on them that matches the electronic chip inside the tag, are stamped with the US shield, and say “unlawful to remove.”

Two RFID technologies are acceptable under federal standards. Both HDX (half-duplex) and FDX (full-duplex) low-frequency ear tags meet U.S. standards for official EID. Either is acceptable for official purposes. Choose based on your reader equipment and management software.

The tag must also display the official USDA ear tag shield. Producers should ensure any tags they purchase have the USDA official ear tag shield printed on them. Tags without the shield are not considered official identification, even if they carry an 840-series number.

Your Premises Identification Number is a prerequisite for purchasing 840 tags. In Tennessee, obtaining a premises ID is free and easy to do, and it is available through TDA. Contact the Tennessee Department of Agriculture at TN.Agriculture@tn.gov or call 615-837-5103 to register your premises before placing a tag order.

Tag Feature	Requirement
AIN format	15-digit number beginning with 840
RFID technology	HDX or FDX low-frequency
Visual marking	Official USDA shield printed on tag
Legal statement	“Unlawful to Remove” printed on tag
Prerequisite to order	Valid Premises Identification Number (PIN)
Effective date for new tags	November 5, 2024 (cattle and bison)

Species-Specific Ear Tag Rules in Tennessee

Tennessee’s identification requirements vary meaningfully by species. What qualifies as official ID for cattle does not automatically apply to sheep, goats, or swine.

Cattle and Bison
As covered above, all covered cattle and bison tagged on or after November 5, 2024, must carry an official 840 RFID tag for interstate movement. All cattle, regardless of age or sex, breed, or current use, that are born on a dairy farm or of a breed used to produce milk or other dairy products are subject to official ID requirements when moving across state lines. Beef feeder cattle under 18 months of age are generally exempt from the EID requirement unless the destination state or a disease program requires otherwise.

Sheep and Goats
Federal and state regulations on sheep and goat identification requirements apply at livestock markets, slaughter establishments, shows and exhibitions, change of ownership, and movement throughout the state. Tennessee follows the minimum federal requirement for sheep and goat identification. Other states may have more stringent requirements.

Official ID options for sheep and goats include USDA scrapie flock tags, registration tattoos accompanied by registration papers, and electronic implantable devices (EID/microchip) when accompanied by a reader and copy of the registration certificate. Unregistered animals can now be microchipped, but they must be from a flock registered with the Scrapie Database, tattooed with flock ID, have the E or ET tattoo, and be accompanied by an ICVI or Owner Hauler Statement listing the implant number as well as a reader. Earless goats may be tagged in the tail fold. To order scrapie tags, call the USDA Office at (615) 781-5314 in Tennessee or 1-866-USDA-TAG, which routes you to the proper state by telephone prefix.

Swine
For interstate movements, all swine must be individually identified with official identification unless the swine are kept as a group. For slaughter swine and feeder swine, an ear tag or tattoo bearing the Premises Identification Number assigned by the State Animal Health Official to the premises where the swine originated satisfies the identification requirement. Official swine tattoos issued by state or federal animal health officials and ear notching recorded by a purebred registry association are also accepted forms of ID.

Horses and Equine
For interstate movements, most states require that horses be individually identified and accompanied by a Certificate of Veterinary Inspection (CVI). Specific requirements, such as proof of negative Equine Infectious Anemia testing (Coggins), or other restrictions based on regional or national disease conditions, are dictated by each importing state. Tennessee requires a current negative EIA test result and a valid CVI for horses entering the state.

Where to Get Official Ear Tags in Tennessee

Tennessee producers have several options for sourcing official 840 RFID tags, including a free-tag program through the state veterinarian’s office.

Tennessee producers and veterinarians can order free EID tags by calling or emailing the Tennessee State Veterinarian’s office. The mailing address is P.O. Box 40627, Nashville, TN 37220. This is the most cost-effective starting point, especially for smaller operations. Supply is subject to federal funding allocations, so contact the office early in the production year.

If the state’s free-tag supply runs short, you can purchase approved 840 RFID tags directly from USDA-approved manufacturers. Three companies account for the bulk of 840 tag sales: Allflex (headquartered in Dallas, TX), Datamars (headquartered in Switzerland with an office in Temple, TX), and Y-Tex (headquartered in Cody, WY). Additional approved manufacturers include All Data Tags LLC, AniTrace Inc., Digital Angel Corp., Eriginate Corp., Global Animal Management, Leader Products, and Shearwell Data Ltd.

RFID 840 tags cost between $2 and $5 per tag, depending on the manufacturer, tag style, and order quantity. For comparison, traditional visual-only metal tags cost $0.10 to $0.25 each and were often provided free by USDA through state veterinarian offices. Tags are available through veterinary supply distributors, farm supply stores, and directly from manufacturers.

For sheep and goat scrapie tags specifically, call the USDA Office at (615) 781-5314 in Tennessee or order sheep and goat tags online through the USDA scrapie tag ordering portal.

Pro Tip: Only Animal Identification Number (AIN) Device Managers can redistribute official 840 EID tags to producers. When purchasing from a distributor, confirm they are a registered AIN Device Manager. Your state veterinarian’s office can verify this status.

How and When to Apply Ear Tags in Tennessee

Proper tag application protects both animal welfare and tag retention — a lost tag creates a traceability gap that can complicate movement paperwork and disease investigations.

Timing
Apply official tags well before any planned movement. Apply the official tag well before movement — for example, at processing, preconditioning, or prior to sale or shipment — to avoid delays. For cattle heading to an auction, tag them at the farm. Most approved livestock markets in Tennessee are also approved tagging sites, so animals without official ID can receive tags on arrival, but relying on this adds a step and potential cost.

Placement
Place the tag in the middle third of the ear, between the two cartilage ribs, avoiding blood vessels. Follow brand-specific instructions. Either ear is acceptable for official 840 tags. For goats without ears, the tag may be placed in the tail fold.

Hygiene and Retention
Clean the applicator and ear before tagging. Ensure firm closure and check retention before animals leave the chute. A poorly seated tag is prone to loss. If an animal loses its official tag, it must be retagged with a new official tag before moving interstate, and both the original and replacement tag numbers should be recorded in your records.

Replacing Lost Tags
If a covered animal loses its 840 RFID tag, apply a new official 840 tag as soon as possible. If you apply a new EID tag to an already officially identified animal, you must record both tag numbers and the date the new tag was applied. This documentation keeps your traceability chain intact and satisfies federal recordkeeping requirements.

Ear Tag Requirements for Interstate Movement in Tennessee

Moving livestock out of Tennessee — or receiving animals from another state — requires more than just an ear tag. Official ID and documentation requirements work together, and missing either piece can stop a shipment.

Livestock must be accompanied by an interstate certificate of veterinary inspection or other documentation, such as owner-shipper statements or brand certificates. Your accredited veterinarian issues the Certificate of Veterinary Inspection (CVI), which must list each animal’s official ID number. All livestock must be accompanied by a Certificate of Veterinary Inspection and/or other federally and state-approved movement documents.

Disease testing adds another layer for some species. Additional testing for diseases such as Tuberculosis, Brucellosis, and Trichomoniasis may be required by the destination state. Always confirm the importing state’s requirements before loading animals — what Tennessee requires on export may differ from what the receiving state demands on import. If you are also hauling animals, review the transporting livestock laws in Tennessee for vehicle and documentation requirements that apply during transport.

There are meaningful exceptions to the interstate ID rule. Exceptions apply for animals crossing state lines to go directly to an approved tagging site such as a livestock auction, for animals moved directly to slaughter or through no more than one USDA-approved livestock facility, and for commuter herds that travel between premises owned by the same person or entity in two different states.

For slaughter cattle specifically, backtags are accepted as an alternative to official eartags for cattle moved directly to slaughter. However, those same animals cannot be diverted to a sale barn or breeding program without proper official ID in place.

As USDA-APHIS Area Veterinarian Kevin Petersburg noted, “If animals are crossing state lines and an official ID is required, then all parties involved are responsible for the animals and need to know the requirements of the state of destination. This includes the breeder, livestock market, shipper, hauler, broker, veterinarian and buyer.”

If you transport animals to neighboring states, each has its own trailer and documentation rules. Tennessee producers moving cattle into neighboring states can review specific requirements for Alabama, Georgia, Mississippi, Missouri, and Kentucky to ensure full compliance on both ends of the trip.

Important Note: Some states have documentation and identification requirements that go beyond the federal minimum. Always check the destination state’s import requirements before moving animals. The USDA APHIS interstate movement requirements tool at aphis.usda.gov/traceability can help you identify state-specific rules.

Recordkeeping Requirements for Ear-Tagged Animals in Tennessee

Tagging an animal is only half the obligation. Federal and state rules require you to maintain records that link each tag number to a specific animal, premises, and movement history. Without those records, a tag number is nearly useless in a disease investigation.

What You Must Keep
At a minimum, your records should include each animal’s official tag number (the full 15-digit AIN for 840 tags), the date the tag was applied, your Premises Identification Number, and the animal’s species, breed, sex, and approximate age. When you move an animal, record the date of movement, the origin premises, and the destination premises or facility.

The federal rule also clarifies certain record retention and record access requirements. Under 9 CFR Part 86, producers, dealers, and livestock markets are generally required to retain movement records for a minimum of five years and make them available to state and federal animal health officials upon request.

Reporting Tag Distributions
The final step in the traceability chain is for the tag distributor to report the official animal ID and premise ID information to the appropriate state agency. In Tennessee, this is the Tennessee Department of Agriculture (TDA). If you receive free tags from the state veterinarian’s office or through a cooperative extension program, the distributing organization typically handles this reporting step — but confirm this with your tag source.

Data Privacy
Animal disease traceability information is housed in official federal and state databases. Those databases are not publicly available. They are only accessible to federal and state government officials who are responsible for dealing with high-impact animal diseases and who have passed extensive security screening and training to ensure data is handled correctly. Your herd data is not shared with the public or accessible via FOIA requests under current federal protections.

Recordkeeping for Replacement Tags
When an animal loses a tag and you apply a replacement, record both the original tag number and the new tag number, along with the date of replacement. This dual-entry approach preserves the animal’s identity trail and satisfies the federal requirement under 9 CFR Part 86 for animals that receive a second official tag.

Good recordkeeping also simplifies your veterinary inspections. When your accredited vet prepares a CVI for interstate movement, having accurate tag records on hand speeds up the process and reduces the chance of errors on official paperwork. For a broader look at what Tennessee requires when moving animals on public roads, see the livestock trailer requirements in Tennessee. If your operation also involves companion animals, you may find the rabies vaccine requirements in Tennessee useful for keeping all your animal health documentation current.

Tennessee’s ear tag framework rewards producers who stay organized. Keep a simple logbook or spreadsheet — tag number, animal description, date applied, PIN, and movement history — and you will have everything state and federal officials need, whenever they need it.