Livestock Microchipping Laws in Pennsylvania: What Every Producer Needs to Know

Pennsylvania has more than 49,000 farms covering roughly 7.3 million acres, and livestock identification sits at the center of every disease-response plan the state and federal government can execute. If you raise cattle, swine, sheep, goats, horses, or cervids in the Keystone State, knowing exactly when a microchip counts as official identification — and when it does not — can save you from failed health certificates, rejected auction entries, and potential misdemeanor charges under state law.

The rules come from two directions at once: Pennsylvania’s own Domestic Animal Law gives the Pennsylvania Department of Agriculture (PDA) broad authority over identification methods, while federal Animal Disease Traceability (ADT) regulations set the floor for any animal crossing a state line. This article walks through both layers so you know precisely where microchips fit, which species can use them, and how to register a chip correctly in Pennsylvania.

Important Note: Pennsylvania does not publish a single consolidated “microchipping regulation.” The rules described here are drawn from the Pennsylvania Domestic Animal Law (3 Pa.C.S. Chapter 23), USDA APHIS 9 CFR Part 86, and species-specific disease program standards. Always confirm current requirements with the PDA Bureau of Animal Health and Diagnostic Services before moving animals interstate.

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

The first thing to understand is that “microchip” and “RFID ear tag” are not interchangeable terms under Pennsylvania or federal law, even though both use radio-frequency technology. Pennsylvania’s Domestic Animal Law explicitly authorizes the PDA to record “distinctive branding marks, tattoos, microchips and other forms of identification that are affixed upon domestic animals” and to maintain a registry of those forms. That broad language means a microchip can be a lawful form of identification in Pennsylvania — but whether it qualifies as official identification for a specific transaction depends on the species and the purpose.

An RFID ear tag approved under the federal 840-numbering system is the most universally accepted form of electronic official ID for interstate livestock movement. Approved tags must be tamper-resistant, have a retention rate of at least 99 percent, and begin with the three digits 840 — the ISO country code for the United States. A microchip implanted under the skin is physically different: it cannot be visually read without a scanner, and it is not accepted at general livestock auctions for most species.

The practical rule of thumb: an 840 RFID ear tag is accepted almost everywhere. A USDA 840 microchip is accepted for farm-to-farm and interstate movements in certain species, but it is not a substitute at general auction sales. Ear tags are effective and visible means of identification, but can be removed intentionally or by trauma — which is one reason implantable microchips remain a legitimate backup option for species where the regulations allow them.

Pro Tip: If you are unsure whether your animal’s microchip will be accepted at a specific Pennsylvania livestock market, call the market manager before loading. Markets set their own reader requirements, and not all have scanners capable of reading implanted chips.

The Federal RFID Mandate and What It Means for Pennsylvania Producers

Federal traceability rules set the baseline that Pennsylvania producers must meet when moving animals across state lines. In 2013, USDA APHIS finalized the “Traceability for Livestock Moving Interstate” rule, establishing minimum animal ID and documentation requirements for the interstate movement of cattle and bison, sheep and goats, swine, horses and other equines, captive cervids, and poultry. That rule has since been updated in a significant way that directly affects Pennsylvania cattle and bison operations.

The updated Animal Disease Traceability regulations, effective November 5, 2024, require that cattle tags applied after that date must be both visually and electronically readable (RFID). This is the change most Pennsylvania beef and dairy producers need to act on. 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.

For species other than cattle and bison, the 2013 framework still governs, with each species carrying its own identification device options. Each covered species has its own animal ID devices, methods, and requirements. Critically, animals that never leave the state they are born in are not subject to federal traceability regulations. Pennsylvania-only movements are governed by state rules alone, which gives the PDA authority to impose requirements beyond what federal law demands.

Species	Federal Rule Effective Date	Primary Official ID for Interstate Movement	Microchip Accepted?
Cattle & Bison	Nov. 5, 2024	840 RFID ear tag (visually + electronically readable)	No (ear tag required)
Swine	2013 ADT Rule	840 RFID ear tag or group/lot ID	Limited
Sheep & Goats	2013 ADT Rule / Scrapie Program	840 RFID ear tag or 840 microchip (farm-to-farm)	Yes, with conditions
Horses & Equines	2013 ADT Rule	Description, brand, tattoo, or ISO microchip	Yes, ISO-compliant
Captive Cervids	2013 ADT Rule	840 RFID ear tag or 840 microchip	Yes, with conditions

To support implementation of these regulations, USDA continues to prioritize funding to offer no-cost electronic IDs for cattle moving interstate, aiming to reduce the financial burden on producers and encourage compliance. Pennsylvania producers can access no-cost tags through the USDA APHIS Animal Disease Traceability program.

Which Livestock Can Use a Microchip as Official Identification in Pennsylvania

Not every species on your Pennsylvania farm can substitute a microchip for an ear tag. The answer varies by species, program, and transaction type. Here is how the rules break down for the animals most commonly raised in the Commonwealth.

Horses and other equines have the most flexible microchip rules. ISO-compliant electronic identification — such as a microchip — is an accepted form of official identification for equines moving interstate. The ISO standard matters here: a non-ISO chip implanted before March 11, 2014, is also grandfathered in under federal rules, but any new chip must meet ISO specifications. The American National Standards Institute voted in favor of ISO standards for microchip frequencies, and the AVMA’s Equine Species Working Group urged use of the ISO standard for equine identification.

Sheep and goats can use a USDA 840 microchip as official identification for farm-to-farm movements, including across state lines. Microchips are official for movements between farms, including interstate movements. However, microchips are not official for general auction sales, and animals need an official ear tag at those sales. The only official microchip accepted as official identification in sheep or goats is a USDA 840 microchip, and you are responsible for having a scanner available that can read the chip.

Captive cervids — including deer and elk raised on Pennsylvania cervidae livestock operations — may also use the 840 microchip as official ID. The 840-ID Official Microchip can be used in all equines, goats, sheep, alpaca, llama, elk, whitetail and other deer, and similar species.

Cattle and bison cannot use an implantable microchip as their primary official ID for interstate movement under the post-November 2024 rules. The federal mandate requires an RFID ear tag that is both visually and electronically readable. RFID tags have been used in cattle for years and are required at all major shows; they provide a method of permanent identification that can be read by an RFID reader or wand from a short distance.

Swine require individual official identification for most interstate movements. In 2016, the Pennsylvania Department of Agriculture mandated that all show pigs must have RFID tags in their ears. Implanted microchips are not the standard method for swine; the 840 RFID ear tag is the expected device. If you raise pigs in Pennsylvania, review the livestock transport rules for Pennsylvania before moving animals to fairs or exhibitions.

When a Microchip Qualifies for Interstate Movement in Pennsylvania

Moving livestock out of Pennsylvania — or receiving animals from another state — triggers federal ADT requirements on top of any PDA rules. Unless specifically exempted, livestock traveling over a state border must be officially identified and accompanied by an interstate certificate of veterinary inspection (ICVI) or other documentation. A microchip only satisfies the “officially identified” requirement if it is the right chip for that species and the right transaction type.

For equines leaving Pennsylvania, an ISO-compliant microchip satisfies the official ID requirement and must be recorded on the ICVI. Your accredited veterinarian needs a compatible scanner to read and record the chip number before signing the certificate. For interstate movements, most states require that horses be individually identified and accompanied by a Certificate of Veterinary Inspection, and specific requirements such as proof of negative EIA testing are dictated by each importing state. Always call the destination state’s animal health office before you load.

For sheep and goats moving from a Pennsylvania farm to a farm in another state, a 840 microchip works — but you must document the chip number on the ICVI or owner-shipper statement. If those animals are heading to a general auction in the destination state, they will need an official ear tag at the point of sale. You can sell sheep or goats at a registered animal auction using official microchips as official identification only if the buyer receives the registration papers; you can sell at a breeding stock auction using a flock ID and microchip only if the animals arrive with a CVI or owner-shipper statement that includes the microchip numbers.

Key Insight: Exemptions from official ID requirements exist for livestock moving directly to slaughter, within tribal land, or under certain commuter herd agreements. Exemptions apply for livestock moving within tribal land or to a custom slaughter facility. If you believe your movement qualifies for an exemption, confirm it in writing with the PDA before transport.

If you regularly move livestock across state lines, also review Pennsylvania’s livestock transport laws and the state’s animal import requirements for a fuller picture of documentation obligations.

Approved Microchip Standards and Placement by Species in Pennsylvania

Pennsylvania does not publish a separate state microchip standard for livestock beyond what federal law requires. The operative standard is the USDA 840 numbering system for most food-producing species, and ISO compliance for equines. Here is what that means in practice for each species.

Equines: The chip must meet ISO 11784/11785 specifications and be implanted in the nuchal ligament on the left side of the neck, which is the location recognized by most international equine registries and accepted by accredited veterinarians issuing Pennsylvania health certificates. The AVMA states that implantation of microchips is a veterinary procedure that should be performed by a licensed veterinarian or under supervision of a licensed veterinarian.

Sheep and goats: The 840-ID Microchip is an officially approved microchip, and the FDA’s Center for Veterinary Medicine has also approved the 840-ID Microchip for use in sheep and goats. The chip number begins with 840, the U.S. country code. Placement is typically in the ear or subcutaneously behind the ear, following veterinary guidance. There are restrictions on the use of implantable devices; refer to page 55 of the National Scrapie Eradication Program Standards for the full placement protocol.

Captive cervids: Pennsylvania’s Cervidae Livestock Operations are regulated under Chapter 23 of the Domestic Animal Law. The 840 microchip is an accepted identification method. Placement is typically in the ear or neck area and must be recorded against your premises ID. For horses, deer, elk, alpaca, llama, and other livestock, you must have a Premises ID Number to order official 840 chips.

• 840 microchips for sheep/goats/cervids/equines: Must begin with the digits 840 (U.S. ISO country code)
• Equine chips: Must meet ISO 11784/11785 frequency standards
• Implantation: Must be performed by or under the supervision of a licensed veterinarian in Pennsylvania
• Scanner requirement: You must own or have access to a compatible reader — the burden of readability falls on the animal’s owner
• Cattle and swine: RFID ear tags are the required device; implanted microchips are not an approved substitute for official identification

Registering a Livestock Microchip in Pennsylvania

Registering a livestock microchip in Pennsylvania involves two parallel steps: obtaining a Premises Identification Number (PIN) from the PDA, and ensuring the chip number is tied to that premises in any relevant disease program database. Neither step is optional if you intend to use the chip as official identification.

Step 1 — Get your Premises ID. As a producer, whether you own one animal or a thousand, you should have a premises ID. The premises ID is a number assigned by the state that enables the state to notify you if a major disease outbreak occurs in your area or across the United States. You can apply through the Pennsylvania Department of Agriculture’s Premises Registration Form. You must have a premises ID to order RFID tags or official microchips. If you do not have one, you can apply online through the PDA’s Premises Registration Form, and in a few weeks you will receive your Premises ID number.

Step 2 — Obtain a Scrapie Flock/Herd ID (sheep and goats only). For goats and sheep, you must have both a Premises ID Number and a Flock (Scrapie) ID Number. To get your Premises ID, visit your state-specific Animal Health Office. To get your Scrapie Flock ID, call 866-873-2824. The 840 microchip order cannot ship until both IDs are verified by the supplier.

Step 3 — Order approved chips from a USDA-listed supplier. Once you have your Premises ID number, you can order 840 RFID tags or approved microchips from many different companies. A listing of all approved tags and devices can be found on the USDA APHIS site.

Step 4 — Record the ID under Pennsylvania’s Domestic Animal Law. Pennsylvania authorizes the PDA to record the adoption and exclusive use of unique identification marks, numbers or devices — including microchips — and to maintain a registry of such forms of identification. An owner of a recorded form of identification pays the PDA a fee of $5 on January 1 of every fifth year from the year the form was recorded. Within ten days of receiving certified copies of the record, the owner must file one copy in the office of the county recorder where the owner’s principal place of business is located and one copy in each county where animals bearing that ID are kept.

Pro Tip: Keep a copy of your Premises ID, Scrapie Flock ID (if applicable), and each animal’s microchip number in a binder that travels with your animals. Your accredited veterinarian will need those numbers to complete a valid ICVI, and missing documentation is the most common reason health certificates are rejected at state borders.

If you raise goats in Pennsylvania, the registration process connects directly to broader ownership and husbandry rules covered in the Pennsylvania goat ownership laws guide.

Microchipping as Proof of Ownership in Pennsylvania

Pennsylvania’s Domestic Animal Law gives microchip records a meaningful legal role beyond disease traceability. When livestock ownership is disputed — whether in a civil lawsuit, a theft case, or a straying-animal situation — a properly registered identification can tip the scales in your favor.

In all suits at law or in equity or in any criminal proceedings in which the title to domestic animals is an issue, the certified copies recorded pursuant to Pennsylvania’s identification recording statute constitute prima facie evidence of ownership. That means a microchip number tied to your recorded premises and county filings carries real evidentiary weight in a Pennsylvania courtroom.

The flip side is equally important. It is unlawful for any person to place, attach or use on a domestic animal any form of identification — including a microchip or other identifying device — that such person knows misrepresents the identity or health of the domestic animal, with intent to interfere or deceive in the identification, testing, vaccinating, selling, transfer or slaughter of the domestic animal. Any person convicted of violating this provision is guilty of a misdemeanor of the second degree and may be imprisoned for not more than two years and fined not more than $5,000.

Practically speaking, this means that if you purchase a livestock animal in Pennsylvania and later discover its microchip was altered or falsely registered, you have both a civil claim and a basis for a criminal complaint. It also means you need to verify chip numbers match paperwork at the point of purchase — not after the animal is already in your barn.

For broader context on how Pennsylvania law handles animal ownership disputes and property rights, the Pennsylvania animal cruelty laws article covers the welfare standards that run alongside identification requirements. Producers who also keep backyard chickens or other poultry alongside livestock should review Pennsylvania’s backyard chicken laws and beekeeping regulations for a complete picture of agricultural compliance in the Commonwealth.

The bottom line on ownership proof: register your microchip numbers through the PDA process, file certified copies in the appropriate county recorder’s offices, and keep those records current. A chip under the skin means nothing legally if you cannot produce the paperwork that ties that number to your name and premises.