Livestock Ear Tag Requirements in Delaware: What Every Producer Needs to Know
August 1, 2026
If you raise cattle, sheep, swine, or goats in Delaware, official ear tag requirements are not optional — they are a federal and state compliance obligation that directly affects your ability to move animals, sell at auction, and participate in disease control programs. Getting this wrong can mean fines, confiscated animals, or losing selling privileges at markets.
A major federal rule change took effect on November 5, 2024, shifting the standard for official cattle and bison identification from simple visual metal tags to electronic RFID ear tags. Delaware producers operating under the Delaware Department of Agriculture (DDA) must align with both that federal mandate and state-level traceability requirements. This guide walks you through every layer of the rules so you can tag correctly the first time.
Which Animals Require Official Ear Tags in Delaware
Not every animal on your Delaware farm needs an official government ear tag, but the list is broader than many producers expect. The species covered under federal animal disease traceability regulations 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 and bison of any age used for rodeo, recreational events, shows, or exhibitions), sheep and goats, swine, horses and other equids, captive cervids such as deer and elk, and poultry.
For Delaware beef and dairy operations, the trigger points are clear. The 2024 rule applies to sexually intact cattle at or over the age of 18 months, all female dairy cattle of any age, male dairy cattle born after March 11, 2013, and all cattle used for rodeo, showing, or exhibitions. Beef feeder cattle under 18 months that stay within Delaware and go directly to a USDA-inspected slaughter facility are generally exempt, but any other movement changes that calculation.
Sheep and goats carry their own mandatory identification requirements under the National Scrapie Eradication Program. 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, and sheep not in slaughter channels must be officially identified. Sexually intact goats not in slaughter channels of any age that do not qualify as low-risk commercial goats — such as those that are registered, sold for commercial milk production, or sold for exhibition — also require official identification.
For swine, the identification standard differs by movement type. 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 on which the swine originated is required. Breeding swine moving interstate require a higher level of official identification, typically an 840-series tag.
Pro Tip: Even if your animals are not currently moving interstate, tagging them correctly now prevents scrambling at sale time. Many Delaware livestock markets require official identification as a condition of entry regardless of the animal’s origin.
Federal RFID Ear Tag Rule: What Changed in November 2024
The single biggest shift in livestock identification in a generation happened 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.
USDA APHIS amended the animal disease traceability regulations to require that ear tags applied on or after November 5, 2024, 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. In plain terms: if you apply a new tag to a covered animal after that date, it must be an RFID-capable 840 tag — a plain metal or plastic visual-only tag no longer qualifies.
This requirement applies to official identification placed for any reason, including interstate movement, brucellosis vaccination, and tuberculosis testing. 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 matters for Delaware producers who already had metal NUES tags in their herd before the cutoff date.
These changes only apply to official ID for cattle and bison. 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 RFID rule applies specifically to cattle and bison. Sheep, goats, swine, and equine have separate identification standards that were not changed by this rule. Always verify species-specific requirements with the DDA or your accredited veterinarian.
Official 840 RFID Ear Tag Requirements in Delaware
Understanding what makes a tag “official” saves you from purchasing the wrong product. Official EID tags are USDA-approved official tags that 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.” The number “840” is the international livestock code for the United States, and each tag’s remaining 12 digits form a unique Animal Identification Number (AIN) assigned to that specific animal.
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. As of that date, the only official tags that meet these requirements are 840 RFID tags. Tags that carry only a printed number without an embedded RFID transponder are no longer acceptable for newly tagged animals.
Before you can order 840 tags, you need a Premises Identification Number (PIN). To obtain AIN tags, a producer must first register their premises and obtain a premise ID number (PIN) from their state animal health authority; a premise ID number is required for ordering. In Delaware, contact the DDA’s Poultry and Animal Health section to register your premises and receive your PIN. Without it, no authorized tag distributor will process your order.
Two physical formats of 840 RFID tags are widely used. Matched pair livestock tags are sets of tags that include a visual tag and an electronic ID tag. What makes them “matched” is that the EID number is printed on both tags. This helps ensure that if one tag is lost from the animal’s ear, there is still another form of identification. All-in-one button tags combine both components in a single tag, which saves an ear hole and speeds up high-volume tagging.
| Tag Feature | Requirement |
|---|---|
| Number format | 15 digits beginning with 840 |
| Electronic component | RFID transponder (required for cattle/bison tagged after Nov. 5, 2024) |
| Visual marking | US shield emblem and “Unlawful to Remove” text |
| Uniqueness | One AIN per animal — never reused |
| Tamper resistance | One-time use; cannot be transferred to another animal |
| Premises link | PIN required at time of purchase |
Species-Specific Ear Tag Rules in Delaware
Delaware producers raising multiple species need to track separate identification standards for each one. The rules are not interchangeable — cattle RFID tags should not be used on small ruminants, as these animals have their own RFID tags.
Cattle and Bison: As described above, all covered cattle and bison receiving new official ID after November 5, 2024, must receive 840 RFID tags. Cattle and bison under 18 months of age and cattle and bison going directly to slaughter are exempt from the requirements for official identification. Animals already carrying a grandfathered visual tag applied before the cutoff remain officially identified for life unless that tag is lost.
Sheep and Goats: The National Scrapie Eradication Program governs sheep and goat identification. Official identification ear tags for sheep and goats must conform to the alpha-numeric National Uniform Eartagging System, which provides unique identification for each animal. The ear tag must have a “V” followed by two letters and four numbers. Scrapie program tags are white for animals that meet the requirements to move for any purpose, and yellow for permanently restricted high-risk animals. Your accredited veterinarian or the DDA can supply these tags.
Swine: Swine identification in Delaware follows the federal PIN tag system for most movements. PIN tags are specifically designed for culled breeding animals that are going to be shipped for harvest only. For breeding swine moving interstate, 840-series ear tags are the preferred identification. When purchasing 840 tags, the purchaser is required to submit their Premise ID number, and the tag distributor will then confirm that the Premise ID number given is accurate.
Equine: Horses and other equids moving interstate from Delaware require a Certificate of Veterinary Inspection (CVI) and, depending on the destination state, a negative Coggins test for equine infectious anemia. Microchip implants using the 840 AIN system are available as an alternative to ear tags for equine. 840 AINs are available in microchip implants for equine and other species.
Where to Get Official Ear Tags in Delaware
You have several options for sourcing official 840 RFID tags in Delaware, but every path starts with your registered Premises ID. You cannot legally purchase official tags without it.
The most direct route is through your accredited veterinarian. Producers can purchase tags from approved manufacturers directly or check with their veterinarian to see if they have a supply of RFID tags. Many Delaware veterinarians who work with livestock keep a stock of 840 RFID tags on hand for regulatory vaccination and testing programs. If your vet participates in brucellosis vaccination or tuberculosis testing, they likely already have access to official tags.
You can also order directly from USDA-approved manufacturers. 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 authorized 840 RFID tags and will verify your PIN at checkout.
Cost is a real consideration for Delaware producers. 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. Federal funding has been allocated to offset some of this cost. Congress allocated $15 million in the March 2024 Consolidated Appropriations Act specifically for EID tags, and many state veterinarian offices distribute free 840 RFID tags to producers, though supply has been uneven. Contact the DDA directly to ask whether free tags are currently available for Delaware producers.
Pro Tip: Order tags before you need them. Keep in mind that it may take several days for your tag order to be received, processed, shipped, and delivered. Waiting until the day before a sale or transport is a common mistake that leads to compliance problems.
How and When to Apply Ear Tags in Delaware
Correct application technique protects both animal welfare and tag retention. A tag that falls out because of improper placement is not just a compliance problem — it means you may need to retag the animal and update your records.
USDA prefers producers apply ear tags in the left ear, leaving the right ear for official use. All ear tags should be placed two-thirds of the way from the outside edge of the ear, and one-third of the way from the head between the middle two cartilage ribs. This placement minimizes the risk of tearing and maximizes long-term retention.
For two-piece tags, orientation matters. Tag Piece A is the piece attached to the inside of the animal’s ear and is visible from the front of the animal. Tag Piece B is attached to the outside of the ear and is visible from behind. Imprinting the AIN on Tag Piece A is required; imprinting the AIN on Tag Piece B is optional.
Timing requirements depend on the purpose of the tag. For cattle and bison subject to the federal rule, the tag must be applied before the animal leaves your premises for any covered movement — not at the sale barn or at the destination. For brucellosis vaccination, the orange RFID button tag is applied by an accredited veterinarian at the time of vaccination. The official brucellosis identification is an orange RFID button, placed in the right ear by the herd veterinarian at the time of vaccination.
Always use the correct applicator for the tag style you purchase. Special tag applicators are required for RFID tags. Follow all manufacturer recommendations for tag application and placement to minimize stress on your livestock and ensure that tags stay in as long as possible. Using the wrong applicator can damage the RFID transponder inside the tag, rendering it unreadable — and non-compliant — even though it looks fine visually.
Ear Tag Requirements for Interstate Movement in Delaware
Moving livestock out of Delaware — or receiving animals from another state — triggers a specific set of federal and state requirements that go beyond just having a tag in the ear. If you regularly move animals to Pennsylvania, Maryland, or New Jersey, you need to understand these rules thoroughly. You can also review livestock trailer requirements in Pennsylvania and livestock trailer requirements in Georgia if your routes extend further.
Federal regulations establish minimum national official identification and documentation requirements for the traceability of livestock moving interstate. For covered cattle and bison, that means a valid 840 RFID tag applied before the animal leaves your Delaware premises. Per 9 CFR 86.2(b), no person may move covered livestock interstate or receive livestock moved interstate unless all requirements of Part 86 are met.
Most interstate movements also require a Certificate of Veterinary Inspection (CVI), commonly called a health certificate, issued by an accredited veterinarian. The CVI documents the animal’s official identification number, origin premises, destination, and health status. Some species and movement types also require specific disease test results — a negative brucellosis test for certain cattle, for example, or a negative Coggins test for horses.
All livestock should be identified with official ID tags or other approved identification before moving to a public sale, event, or across state lines. The exact requirements vary with the species, type of animals, and type of movement. Delaware producers shipping to states with stricter inbound requirements must meet the destination state’s rules, not just Delaware’s. Always confirm requirements with both the DDA and the receiving state’s animal health authority before transport.
| Movement Type | Official ID Required | Additional Documents |
|---|---|---|
| Cattle/bison to auction (in-state) | 840 RFID tag | Bill of sale |
| Cattle/bison interstate | 840 RFID tag | CVI, disease test results (if required) |
| Sheep/goats interstate | Scrapie program tag or 840 | CVI, scrapie flock status documentation |
| Swine to slaughter | PIN ear tag or tattoo | Owner-shipper certificate |
| Breeding swine interstate | 840-series tag | CVI, health certificate |
| Cattle direct to slaughter | USDA backtag (no RFID required) | Slaughter-only documentation |
Delaware’s proximity to several neighboring states makes proper documentation especially important. If you ship cattle to farms in Missouri, Tennessee, or other states, each destination has its own inbound health certificate and identification requirements that you must satisfy before loading.
Recordkeeping Requirements for Ear-Tagged Animals in Delaware
Tagging an animal is only half the compliance obligation. Maintaining accurate records that connect each tag number to a specific animal, premises, and movement history is equally required — and equally enforceable.
The Delaware Department of Agriculture may make rules and regulations to aid in carrying out the purposes of its livestock chapters. These rules may include requirements for recordkeeping by livestock dealers to identify animals and sales for the purpose of tracing animals found to be diseased at a later date. Violations carry real consequences: whoever violates any provisions of Delaware’s livestock chapter or any rules or regulations promulgated under it is guilty of a class C misdemeanor.
At the federal level, USDA APHIS requires that tag distribution records be maintained to support disease traceability investigations. When disease is discovered at a farm, processing plant, or market, animal records tell investigators what animals may have been exposed and where they went or came from. Tag information is recorded when tags are applied, at selling points, when official movements are recorded, and when a disease investigation is being conducted.
For your own operation, you should maintain records that include, at minimum:
- The AIN (840 number) of each officially tagged animal
- The date the tag was applied
- The species, sex, and approximate age of the animal
- Your Premises ID (PIN) linked to each tag purchase
- Movement records — dates, origin, and destination for each interstate shipment
- CVIs and health certificates for all interstate movements
- Replacement tag records if an animal loses its original tag
While the regulations do not require the digitization of paper records, APHIS has encouraged the use of electronic recordkeeping through targeted funding to State and Tribal animal health officials to support their electronic recordkeeping systems and maintain internal databases used for animal disease traceability. A basic spreadsheet or farm management software works well for most small and mid-sized Delaware operations. Larger commercial operations should consider dedicated livestock management software that integrates RFID scanner data directly.
Pro Tip: Keep tag records for at least three years, and store copies off-site or in cloud backup. If a disease investigation reaches your farm, investigators will expect records on short notice. Missing or incomplete records can complicate your operation even if your animals are healthy.
Delaware livestock producers should also stay current with broader animal health regulations. If you hold a Delaware fishing license, you may find the fishing license requirements in Delaware resource helpful for other state compliance matters. For cat owners on your property, Delaware’s rabies vaccine requirements for cats are a related state animal health obligation worth knowing. Producers in neighboring states can reference guides for livestock trailer requirements in Alabama, livestock trailer requirements in Florida, and livestock trailer requirements in Wyoming for multi-state transport planning.
The bottom line for Delaware livestock producers is straightforward: get your premises registered, use only USDA-approved 840 RFID tags for cattle and bison receiving new official identification, follow species-specific rules for sheep, goats, and swine, and keep thorough records of every tag applied and every animal moved. Compliance is not complicated once the system is set up — and it protects both your operation and Delaware’s broader livestock industry from the devastating economic impact of a disease outbreak. Contact the Delaware Department of Agriculture’s Poultry and Animal Health division or the USDA APHIS official ear tag criteria document for the most current species-specific guidance.