Livestock Microchipping Laws in Virginia: What Producers Need to Know

If you raise cattle, horses, sheep, goats, or swine in Virginia, the question of official identification follows you from the sale barn to the state line. Microchips and RFID ear tags are both electronic identification tools, but Virginia law and federal regulations treat them very differently depending on the species, the movement type, and the purpose of identification.

This guide walks you through exactly where microchips fit into Virginia’s livestock ID framework — when they count as official identification, when they don’t, and what you need to do to make a chip legally useful for interstate movement, market access, and proof of ownership.

Important Note: Virginia livestock identification requirements are governed by both the Virginia Department of Agriculture and Consumer Services (VDACS) and federal USDA-APHIS regulations. Always confirm current requirements with the VDACS Office of Veterinary Services before moving animals across state lines, as rules can change.

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

The terms “microchip” and “RFID” are often used interchangeably, but in Virginia’s livestock identification system they describe two distinct devices with different legal standing. An RFID ear tag is an external tag clipped to the animal’s ear that transmits a unique number when scanned. A microchip, by contrast, is a small implantable transponder injected under the skin or into soft tissue.

Electronic Identification Device (EID) is another term for RFID, and “microchipping” or “chipping” can also refer to the microchip transponder implant placed under the skin. Both rely on radio-frequency technology, but their regulatory roles diverge sharply for most livestock species in Virginia.

Official animal identification tags are used to identify livestock and poultry in Virginia and must be applied by an accredited veterinarian or state or federal animal health official. For cattle, sheep, goats, and swine, that official tag is almost always an 840-series RFID ear tag — not a subcutaneous microchip implant. The 840 prefix is the international livestock code for the United States, and “840” is the preferred type of tag for most animals moving in interstate or international commerce.

A subcutaneous microchip implant does qualify as official identification in Virginia, but only for one livestock species: horses. For cattle, sheep, goats, and swine, a microchip implant does not replace the required RFID ear tag under state or federal rules. Understanding this species-by-species distinction is the foundation of Virginia’s livestock ID framework.

Pro Tip: If you have multiple species on the same farm, do not assume that microchipping one type of animal satisfies the ID requirement for another. The rules are species-specific.

The Federal RFID Mandate and What It Means for Virginia Producers

The most significant recent change to livestock identification in the United States came from USDA’s Animal and Plant Health Inspection Service (APHIS). The updated Animal Disease Traceability (ADT) regulations, effective November 5, 2024, aim to enhance the nation’s ability to respond to and mitigate the impact of foreign or significant diseases affecting livestock.

Cattle tags applied after November 5, 2024, must be both visually and electronically readable (RFID). This effectively ended the use of traditional metal brite tags (NUES tags) as standalone official identification for new tagging events. 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.

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. Virginia producers who move these classes of cattle across state lines must now ensure any new tag applied is an 840-series RFID ear tag.

The ADT program applies to movement between states of sexually intact beef cattle 18 months of age or older and dairy cattle of any age. Feeder cattle and movements of any class of livestock within a state are not subject to the ADT program and are not required by federal law to be identified with electronic ID or otherwise. In-state movements in Virginia are governed by VDACS rules, which have their own requirements for public sales and exhibitions.

For Virginia cattle producers, the practical takeaway is straightforward: official 840-series (RFID) tags are required, though cattle tagged with official USDA metal tags before November 5, 2024, are exempt from this requirement. You can learn more about what to expect when moving animals in our guide to transporting livestock laws in Virginia.

Which Livestock Can Use a Microchip as Official Identification in Virginia

Virginia’s Administrative Code is explicit about which species may use a microchip implant as official identification. Under 2VAC5-61-30, the regulations governing livestock dealers and marketing facilities, identification requirements are laid out by species.

Official identification for cattle shall be an ear tag bearing a unique identification number issued by an official state or federal program or other form of identification approved by the State Veterinarian. No provision exists for cattle microchip implants as a substitute for the ear tag requirement.

Official identification for horses shall be a microchip, registration tattoo, brand, name, and complete physical description as listed or demonstrated by photographs on either a current certificate of veterinary inspection or Coggins test certificate, or other form of identification approved by the State Veterinarian. Horses are the only livestock species in Virginia for which a subcutaneous microchip implant stands as an accepted form of official ID on its own.

For sheep and goats, sheep and goats arriving at Virginia public livestock markets must be officially identified. Markets may provide tagging services, often for a fee. Approved official 840-series (RFID) tags include USDA-approved ear tags used for the Scrapie Eradication or Flock Certification Programs. A microchip implant does not satisfy this requirement for small ruminants. If you raise goats in Virginia, our article on goat ownership laws in Virginia covers additional regulatory requirements you should know.

Most swine in Virginia belong to integrated commercial systems using identification programs endorsed by the pork industry. Producers should verify specific state entry requirements. Official 840-series swine tags are available online, and VDACS offers official metal swine tags at no cost. Microchip implants are not listed as an approved official ID method for swine in Virginia.

When a Microchip Qualifies for Interstate Movement in Virginia

For horses leaving or entering Virginia across state lines, a microchip is a recognized identification method, but it does not travel alone. Equines generally require some form of individual identification and a Certificate of Veterinary Inspection (CVI). Owners should check specific state entry requirements before transporting horses across state lines.

The microchip number must appear on the CVI to serve as the linking identifier between the document and the animal. Before transporting animals into Virginia, you must obtain a Certificate of Veterinary Inspection (CVI) and, in some cases, a permit. This applies in reverse as well — when moving a Virginia-based horse to another state, the CVI must reflect the chip number that will be scanned at the destination.

For cattle moving interstate, a microchip implant does not replace the 840-series RFID ear tag requirement. One narrow exception exists for commuter herds: cattle moving temporarily to an adjacent state for grazing purposes that do not change ownership must be officially identified, but do not require a CVI. A signed Commuter Herd Agreement must be in place with both states before cattle move in this manner. Even under a commuter herd agreement, official identification means an 840 RFID ear tag — not a microchip implant.

Pro Tip: Virginia accepts Certificates of Veterinary Inspection from several approved electronic platforms, which can streamline interstate movement paperwork. Ask your accredited veterinarian which platform they use before scheduling a pre-movement exam.

Cattle moving directly to slaughter have a separate pathway: cattle moving directly to slaughter from approved markets may use official back tags without CVI. This is a limited exception and does not apply to breeding stock, exhibition animals, or any animal that changes ownership before slaughter.

Approved Microchip Standards and Placement by Species in Virginia

When a microchip is used as official identification for a horse in Virginia, it must meet recognized standards to be readable by veterinarians, state officials, and destination-state inspectors. The two governing standards are ISO 11784 and ISO 11785.

The microchip is a passive transponder, each about the size of a grain of rice, programmed with a unique 15-digit identification number compatible with ISO Standards 11784 and 11785. The ISO standard frequency is 134.2 kHz. Chips operating at 125 kHz or 128 kHz are non-ISO and may not be readable by standard livestock scanners used by state and federal officials.

For horses, the implantation site follows an internationally recognized standard. In horses, microchips are usually implanted with a needle and syringe in the nuchal ligament, halfway between the poll and withers, on the left side of the neck. The Jockey Club specifies that ISO 11784/11785 compliant microchips are to be inserted on the left side nuchal ligament.

Microchip implantation is a veterinary procedure and should be performed by a licensed veterinarian. Virginia does not authorize owners to self-implant chips in horses for official ID purposes — the procedure must be performed or directly supervised by an accredited vet who can then document the chip number on regulatory paperwork.

The following table summarizes approved identification methods by livestock species in Virginia:

Species	Microchip Implant as Official ID	Required Official Tag	Additional Documentation
Horses	Yes (ISO 11784/11785, left nuchal ligament)	Not required if microchip used	CVI with chip number listed
Beef Cattle	No	840-series RFID ear tag	CVI for most interstate moves
Dairy Cattle	No	840-series RFID ear tag	CVI for interstate moves
Sheep & Goats	No	840-series RFID or Scrapie tag	CVI for interstate moves
Swine	No	840-series tag or official metal tag	CVI for interstate moves

Registering a Livestock Microchip in Virginia

Implanting a microchip is only half the job. A chip that is not registered to an owner in a traceable database provides no real benefit in a disease investigation, a theft case, or an ownership dispute. Virginia’s Animal Disease Traceability Program, managed by VDACS through its Office of Veterinary Services, ties identification to a specific premises through the Premises Identification Number (PIN) system.

The Virginia Department of Agriculture and Consumer Services (VDACS), through its Office of Veterinary Services, manages the Virginia Animal Disease Traceability Program. A key component of this program is Livestock Premises Registration, which assigns a unique Premises Identification Number (PIN) to physical locations where animals are kept.

A premises is a physical location where livestock animals are managed or held, which includes locations where livestock are born, raised, marketed, or exhibited. Examples may include farms, ranches, veterinary clinics, stables, livestock markets, and livestock exhibitions.

To register your premises and obtain a PIN, you will need to provide the following information to VDACS:

• Physical address where the animals are kept (P.O. boxes are not accepted)
• Primary contact phone number
• Types of livestock or poultry present (e.g., cattle, horses, sheep, goats, swine)

This service is provided free of charge and is required to receive free official animal identification (ID) tags. An official PIN is required to receive official ID tags from VDACS or to purchase 840-series tags from authorized private vendors.

For horses specifically, registering a microchip involves two parallel steps: the chip number must appear on all regulatory documents (CVIs, Coggins test certificates), and the owner should register the chip number with the relevant breed registry or a national equine microchip database. The horse owner must register the microchip. It is easier to prove ownership of a lost, missing, or stolen horse with its identification number.

A premises ID number ensures faster response and containment in the event of a disease outbreak and is critical for maintaining public and animal health. You can contact the VDACS Office of Veterinary Services at 102 Governor Street, Richmond, VA 23219 to begin the registration process. You may also find it helpful to review our guide on rooster laws in Virginia and other VDACS-regulated animal topics on this site.

Pro Tip: Virginia livestock shows and state fairs often require exhibitors to have a registered PIN. Registering your premises before show season saves time and avoids last-minute compliance issues at check-in.

Microchipping as Proof of Ownership in Virginia

One of the most practical uses of a livestock microchip in Virginia is establishing proof of ownership — particularly for horses, which are the species where a chip carries full official ID status. Microchipping is a safe, permanent, and highly effective form of tagging or branding animals. Implanted in each animal on your farm, your livestock will have a permanent form of identification and proof of ownership. Although no one plans to have their animals lost or stolen, accidents sometimes happen, and when they do, you’ll be glad if your animals are equipped with microchips.

Each microchip has a unique number, which cannot be altered or deleted, that can be read by a hand-held radio frequency scanner. Unlike an ear tag — which can fall out, be cut off, or become unreadable — a properly implanted ISO-standard chip stays with the animal for life. Microchips cannot be inactivated with a magnet. Microchips do not migrate from the implantation site.

In a theft or dispute scenario, the chip number linked to your name in a registry creates a documented ownership trail that physical markings alone cannot replicate. The chip number is registered in a national database along with your name and contact information. Microchips are useful for identifying missing livestock and for proving ownership when crossing state lines or transferring ownership of an animal.

For horses, the ownership chain is strengthened further when the chip number appears on the Coggins test certificate and CVI. Official identification for horses shall be a microchip, registration tattoo, brand, name, and complete physical description as listed or demonstrated by photographs on either a current certificate of veterinary inspection or Coggins test certificate. Having the chip number documented across multiple official records makes it significantly harder for ownership to be disputed.

Virginia law also addresses microchip scanning for companion animals through Code of Virginia § 3.2-6585.1, which requires shelters and veterinarians to scan stray animals for microchips and maintain documentation. While this provision applies to companion animals rather than livestock, it reflects the broader legal framework in Virginia that treats a registered microchip as a meaningful ownership indicator. For related animal law topics in the Commonwealth, see our articles on dog bite laws in Virginia, pit bull laws in Virginia, and dog leash laws in Virginia.

If you own livestock in a neighboring state, the rules may differ. Our guides on goat ownership laws in West Virginia and backyard chicken laws in West Virginia cover comparable identification and ownership topics across the border.

Key Takeaways for Virginia Livestock Producers

Virginia’s livestock microchipping rules come down to a few clear principles. Horses are the only livestock species in Virginia for which a subcutaneous microchip implant serves as standalone official identification. For cattle, sheep, goats, and swine, the required official ID is an 840-series RFID ear tag — and for cattle tagged after November 5, 2024, that tag must be electronically readable under the federal ADT rule.

Registering your premises with VDACS to obtain a PIN is the first step toward accessing official ID tags and participating in Virginia’s Animal Disease Traceability Program. For horses, pair the microchip with a current CVI and Coggins certificate that lists the chip number — that combination gives you the strongest possible documentation for interstate movement, sale, and proof of ownership. Contact the VDACS Animal Disease Traceability Program directly if you have species-specific questions or need to request official tags for your operation.