Livestock Microchipping Laws in New York: What Producers Need to Know

If you raise cattle, sheep, goats, horses, or other livestock in New York, the rules around official animal identification have changed significantly — and the shift directly affects how you move, sell, and prove ownership of your animals. A federally driven mandate that took full effect on November 5, 2024, reshaped what counts as an official ID tag for cattle and bison, and New York State has aligned its own requirements accordingly.

Understanding where implanted microchips fit into this framework — versus RFID ear tags — is not just a compliance question. It determines whether your animals can cross state lines, enter a fair, or be sold through a licensed dealer. This guide walks you through every layer of the rules as they apply to New York producers, species by species and situation by situation.

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

The terms “microchip” and “RFID” are often used interchangeably in everyday conversation, but in the regulatory world they describe two distinct physical devices with different approval statuses depending on the species involved. Getting this distinction right is the first step to staying compliant.

An RFID ear tag is a plastic tag clipped to the ear that contains a radio-frequency chip and a printed Animal Identification Number (AIN). AIN tags carry a 15-digit number — the first three digits indicate the country of origin, with “840” designating the United States — and a number of manufacturers produce them in various shapes, sizes, and colors with RFID microchips embedded within the tag body. An injectable microchip (also called a subcutaneous transponder or PIT tag) is a glass-encased chip implanted under the skin using a needle.

For cattle, USDA’s final rule requires all official tags applied after November 5, 2024, to be both RFID and visually readable. That means a standard ear tag for a cow must now carry both a printed number and an electronic chip — a visual-only metal tag applied after that date no longer qualifies as official identification. An injectable microchip alone does not satisfy the official ID requirement for cattle under New York or federal rules; the ear tag format is the required delivery mechanism for that species.

For other species — including horses, small ruminants, camelids, and cervids — an injectable 840-series microchip is a recognized and approved form of official identification, as detailed in the species-specific sections below. New York State law under Article 5 § 95-a prohibits removal of official ear tags or other identification without authorization by the Commissioner of Agriculture and Markets.

Pro Tip: Visual-only 840 tags and RFID-capable 840 tags can look nearly identical. If you cannot tell whether a tag contains an RFID chip, contact the New York State Department of Agriculture and Markets or check the USDA’s official approved device list before applying it as official identification.

The Federal RFID Mandate and What It Means for New York Producers

The rule driving New York’s current livestock ID requirements originates at the federal level. USDA’s Animal and Plant Health Inspection Service (APHIS) amended the animal disease traceability regulations to require that ear tags applied on or after 180 days after the rule’s Federal Register publication be both visually and electronically readable to be recognized as official ear tags for interstate movement of covered cattle and bison. That effective date landed on November 5, 2024.

The regulation builds on a previous 2013 rule that required all sexually intact cattle and bison 18 months of age or older, dairy cattle, and rodeo and exhibition cattle to carry an official form of animal identification. The 2013 rule allowed visual tags; the 2024 update mandates that any new tag must also be electronically readable. Visual tags such as official metal clip tags applied before November 5, 2024, are still accepted as official IDs, but tags applied after that date must be electronically readable in addition to being visually readable.

While APHIS focuses on interstate movement of livestock, states and tribal nations remain responsible for the traceability of livestock within their jurisdictions. New York has aligned its intrastate requirements with the federal standard. The New York State Department of Agriculture and Markets received a limited supply of 840 RFID-capable ear tags for distribution to New York producers, dealers, rescues, and markets through USDA Traceability Funding in Federal Budget Year 2025–2026.

The practical impact for New York producers is straightforward: if you need to apply a new official ID to a cow or bison today, it must be an 840 RFID-capable ear tag. If you apply ear tags as official identification to cattle, you must use RFID tags starting November 5, 2024, and cattle born in the USA will need 840 ear tags. You can obtain tags from approved manufacturers or, while supplies last, request a limited number through the state. For more on how New York regulates the broader import and movement of animals, see the pet import laws in New York overview for additional context on state-level entry requirements.

Important Note: The federal mandate covers cattle and bison specifically. Other livestock species — sheep, goats, swine, horses, camelids, and cervids — operate under separate identification rules, some of which do permit injectable microchips as official ID. See the species section below for details.

Which Livestock Can Use a Microchip as Official Identification in New York

Not every species on a New York farm follows the same ID rules. The table below summarizes which animals can use an injectable microchip as official identification and which require an ear tag.

Species	Injectable Microchip Accepted as Official ID?	Primary Official ID Device
Cattle & Bison	No (for official ID purposes)	840 RFID ear tag (required after Nov. 5, 2024)
Horses & Equines	Yes	840 injectable microchip or ear tag
Sheep & Goats	Yes	840 injectable microchip or species-specific RFID ear tag
Llamas & Alpacas	Yes	Microchip or ear tag (microchip strongly recognized)
Deer & Elk (Cervids)	Yes	840 injectable microchip or ear tag
Swine	Limited — ear tag preferred	USDA-approved ear tag; 840 RFID strongly recommended

The 840-ID Official Microchip can be used in all equines, goats, sheep, alpaca, llama, elk, whitetail and other deer, and similar species. The FDA’s Center for Veterinary Medicine has also approved the 840-ID Microchip for use in sheep and goats. For cattle, the injectable chip does not replace the mandatory RFID ear tag requirement; it may be used as a supplemental identifier but will not satisfy official ID obligations on its own.

Llamas and alpacas require a microchip or ear tag, and if a microchip is used, the veterinarian must confirm the microchip ID or place one. If your animal is identified by a microchip, make sure you bring a working reader with you when presenting the animal for inspection, movement, or fair entry. For swine, they must be identified by an official USDA-approved ear tag, and 840 RFID ear tags are strongly recommended.

If you keep goats on your New York property, the goat ownership laws in New York page covers additional state-level requirements beyond identification. Producers raising backyard chickens or other poultry should also review the backyard chicken laws in New York for species-specific rules that fall outside the livestock ID framework.

When a Microchip Qualifies for Interstate Movement in New York

Moving livestock across state lines triggers federal Animal Disease Traceability (ADT) requirements under 9 CFR Part 86. Beginning in 2013, USDA APHIS officials started requiring identification and travel documents for livestock that cross state lines, and livestock belonging to species covered by the regulations had to be officially identified and accompanied by an interstate certificate of veterinary inspection or other movement document.

For horses and other equines, an 840 injectable microchip fully satisfies the official ID requirement for interstate movement. Names, tattoos, and microchips, if any, are to be recorded on the Certificate of Veterinary Inspection (CVI). The CVI must be issued by a USDA Category 2 accredited veterinarian, and the microchip number must be verified and recorded on that document before the animal leaves New York.

For cattle and bison, a microchip alone does not qualify for interstate movement under the current federal rule. All dairy females and males born after March 11, 2013, exhibition and rodeo cattle, and sexually intact beef cattle 18 months of age and older must be officially identified before moving interstate. That official identification must take the form of an 840 RFID ear tag for any animal requiring a new tag after November 5, 2024.

For small ruminants (sheep and goats) moving interstate, an 840 injectable microchip is an accepted official identification device when the chip number is recorded on the accompanying CVI. Each chip begins with the United States country code “840,” making it fully compliant with USDA-APHIS and Scrapie regulations. Sheep and goat producers must also maintain a Flock/Scrapie ID in addition to their Premises ID before microchips can be ordered or applied as official devices.

Pro Tip: Always verify with the receiving state’s animal health officials that they accept the specific ID device you plan to use. Some states have additional requirements beyond the federal baseline, and a rejected ID at the border can delay or block your shipment.

For cattle going directly to a USDA-inspected slaughter facility, the rules are slightly different. Cattle and bison are exempted from official identification requirements if they are going directly to slaughter, according to the USDA rule. Backtags can still be used in that scenario, and cattle going direct to a USDA-inspected slaughter facility can move on only a USDA backtag.

Approved Microchip Standards and Placement by Species in New York

Not every microchip on the market qualifies as official identification. USDA APHIS maintains a list of approved Animal Identification Number (AIN) devices, and only chips on that list — encoded with a 15-digit number beginning with “840” — count toward official ID obligations. APHIS does not recommend specific tag providers, but tag companies may submit specific products encoded with a 15-digit official ID number beginning with “840” to APHIS for approval, and the agency maintains a list of approved tag providers.

On the technical side, approved devices for electronic IDs include 134.2 kHz LF RFID tags compliant with both the ISO 11784 and 11785 standards, or UHF RFID tags. Injectable transponders approved for livestock use operate at 134.2 kHz (ISO frequency), which is the same frequency used in many companion animal microchips but encoded with the livestock-specific 840 AIN format rather than a companion animal registry number.

Placement guidelines vary by species:

• Cattle and bison (ear tags): Either ear application is permitted, but the left ear is recommended to avoid conflict with placing of brucellosis calfhood vaccination tattoo in the right ear of female bovine/bison eligible calves.
• Horses and equines (injectable): The microchip is typically implanted in the nuchal ligament on the left side of the neck, at the base of the mane. This location is the international standard for equine microchipping.
• Sheep and goats (injectable or ear tag): Injectable chips are placed subcutaneously in the left ear base or the left side of the neck, depending on the chip size and veterinarian preference. Do not use cattle RFID tags on small ruminants — these animals have their own RFID tags.
• Llamas and alpacas (injectable): Microchip placement is typically in the left side of the neck. RFID tags are recommended to be placed in the left ear when an ear tag is used instead.
• Deer and elk (injectable): Approved injectable transponders for cervids include AVID 840 RFID injectable transponders approved for equine, deer/elk, sheep, and goat use per the USDA AIN device list.

Injectable 840-ID microchips are designed to last a lifetime without replacement and are manufactured under strict quality standards, certified by the USDA for accuracy, durability, and readability. Always confirm that the chip you are ordering is on the USDA’s official AIN device list before implanting it as official identification.

Registering a Livestock Microchip in New York

Implanting a chip is only half the process. For the microchip to function as official identification — and for it to support disease traceability, ownership disputes, or interstate movement — the number must be recorded in the appropriate databases and tied to a valid Premises Identification Number (PIN).

Here is the registration process for New York livestock producers:

1. Obtain a Premises Identification Number (PIN). Every New York livestock operation must register a premises with the New York State Department of Agriculture and Markets. Your PIN links all official ID devices applied on your property to a physical location, which is the backbone of disease traceability.
2. Obtain a Flock/Scrapie ID (sheep and goats only). To use 840 microchips, you must have a Premises ID. If you raise goats or sheep, you must also have a Flock/Scrapie ID. This is a separate registration managed through USDA APHIS.
3. Order approved 840-series chips. Purchase chips only from manufacturers on the USDA-approved AIN device list. You may place your order without the required Premises and/or Flock ID numbers, but you will need to provide that information before the supplier ships to you.
4. Have the chip implanted and recorded by an accredited veterinarian. The CVI must be issued by a USDA Category 2 accredited veterinarian. That veterinarian is responsible for confirming the chip number, recording it on the CVI, and ensuring the number is entered into the relevant tracking system.
5. Record distribution in AIMS. The Animal Identification Management System (AIMS) is a web-based program used to administer official animal identification numbers and devices. All distribution records for AIN devices are maintained in AIMS. Your veterinarian or state animal health official will typically handle this entry.
6. Obtain a Domestic Animal Health Permit (DAHP) if dealing in livestock. Agriculture and Markets’ Part 61 and Article 5, Section 90 C requires all parties dealing in livestock, including horses, to obtain a Domestic Animal Health Permit. To obtain a DAHP, complete a DAHP application and supplement and send them, along with a $50 fee, to the Division of Animal Industry.

New York producers who need emergency RFID tags while awaiting a supplier order can contact the state’s Division of Animal Industry directly. The state has a small amount of tags in reserve for emergencies, available on a case-by-case basis.

Microchipping as Proof of Ownership in New York

Beyond regulatory compliance, a microchip serves as one of the strongest forms of livestock ownership documentation available. Because the 840-series chip number is tied to a specific premises at the time of application — and recorded on official veterinary documents — it creates a paper trail that is difficult to dispute.

In New York, official identification records must be retained for traceback purposes. You are required to record the original animal ID and replacement ID and keep this information for traceback for at least five years per 9 CFR 86.3. This five-year retention requirement applies to any situation where an animal’s original ID is replaced, but the principle extends broadly: maintaining complete microchip and ear tag records protects you in the event of theft, sale disputes, or disease investigation.

If an animal with an official microchip is stolen or strays, the chip number recorded on your CVI and AIMS records ties the animal back to your Premises ID. This is particularly valuable for horses, where microchipping has long been standard practice and the chip number is routinely listed on breed registration papers, Coggins tests, and health certificates.

For livestock sold through a dealer or at auction, official ID is not just about ownership — it is a legal prerequisite. Not putting official identification on animals restricts who can buy them; at auction or off the farm, unidentified animals must be sold to a USDA-recognized slaughter facility per federal requirements. Keeping your microchip and ear tag records current gives you the broadest possible market access.

Important Note: A standard pet-style microchip (such as a 15-digit ISO chip not beginning with “840” or a 10-digit chip) does not qualify as official livestock identification in New York or under federal ADT rules, even if the animal is scanned and the number is on file with a companion animal registry. Only USDA-approved 840-series devices satisfy official ID requirements for livestock.

New York’s animal identification rules sit within a broader web of state livestock and animal law. If you manage multiple species or land uses, the rooster laws in New York and beekeeping laws in New York pages address additional species-specific requirements. Producers dealing with animal welfare questions or neighbor disputes should also review animal cruelty laws in New York and the rules around neighbors’ dogs on your property in New York for relevant state-level protections.

Staying current with both the federal APHIS requirements and New York State Department of Agriculture and Markets guidance is the most reliable way to keep your herd compliant, your animals traceable, and your ownership records airtight. When in doubt, your USDA Category 2 accredited veterinarian is your best first call — they are the linchpin of the official identification and documentation system in New York.