Livestock Ear Tag Requirements in Massachusetts: What Producers Need to Know

If you raise cattle, sheep, goats, swine, or camelids in Massachusetts, official ear tag identification is not optional — it is a legal requirement tied to both state and federal disease traceability programs. Getting it wrong can mean your animals are turned away at a livestock market, blocked from crossing state lines, or flagged during a regulatory inspection.

This guide walks you through every layer of Massachusetts ear tag law: which animals are covered, what changed federally in November 2024, how to get approved tags, when to apply them, and what records you must keep. Whether you run a small hobby farm in the Pioneer Valley or a commercial beef operation in Worcester County, the rules below apply to you.

Which Animals Require Official Ear Tags in Massachusetts

All cattle, swine, sheep, and goats must be identified by an official USDA ear tag, or by a tattoo issued by a breed or other recognized registry and accompanied by proof of registration. This requirement applies whenever these animals move off your premises, change ownership, or enter a livestock market.

Cattle, swine, goats, sheep, llamas and camelids, horses, and other equines must have valid health certificates issued by an accredited veterinarian within 30 days of import to Massachusetts. Ear tag identification is part of that import package for most covered species.

The table below summarizes which species require official ear tags and the primary program driving that requirement:

Species	Official ID Required?	Governing Program
Cattle and bison	Yes — 840 RFID tag (if tagged on or after Nov. 5, 2024)	USDA Animal Disease Traceability (ADT) / 9 CFR Part 86
Sheep	Yes — scrapie tag or approved RFID/tattoo	USDA National Scrapie Eradication Program
Goats	Yes — scrapie tag or approved RFID/tattoo	USDA National Scrapie Eradication Program
Swine	Yes — official ear tag or registration	Massachusetts MGL c. 129 §14E; 9 CFR 71.19
Llamas / alpacas / camelids	Yes — ear tag, registry tattoo, or microchip	Massachusetts Division of Animal Health import permit
Horses and equines	Health certificate required; no mandatory ear tag	Massachusetts 330 CMR 16.05
Poultry	Individual inspection required; no standard ear tag	MGL c. 129 §§2; 330 CMR 5.02

All animals transported into Massachusetts for slaughter must have USDA-approved waybills and back tag certificates. Slaughter animals must be identified by ear tags, back tags, or other USDA-approved identification. This means even animals headed directly to a processing facility cannot move without some form of official ID.

Pro Tip: Poultry and horses do not require standard ear tags, but they do trigger other documentation requirements. Confirm species-specific rules with the Massachusetts Department of Agricultural Resources (MDAR) Division of Animal Health before moving any livestock.

Federal RFID Ear Tag Rule: What Changed in November 2024

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 180 days after publication of the final rule 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. That 180-day window expired on November 5, 2024, making RFID the new standard.

Per 9 CFR Part 86, visual-only NUES tags are no longer acceptable as official identification for cattle and bison when applied on or after November 5, 2024. Visual-only NUES tags for cattle and bison placed in ears prior to this date will be considered official for the life of the animal. You do not need to retag animals that already carry a pre-November 2024 visual tag — those tags are grandfathered.

This requirement applies to official identification placed for any reason, including interstate movement, brucellosis vaccination, and tuberculosis testing. It is not limited to sale or transport scenarios.

The rule targets specific categories of animals, not every cow on your farm. The rule applies to specific categories of cattle and bison crossing state lines: sexually intact beef cattle and bison 18 months of age or older, and animals required to be officially identified under any federal disease program (brucellosis, tuberculosis). USDA estimates this affects approximately 11 to 12 percent of the national cattle herd in any given year.

Several categories are exempt from the EID requirement, including beef feeder cattle under 18 months (unless the destination state or a disease program requires it), and animals already tagged with official visual-only tags before November 5, 2024 — these are grandfathered for the life of the animal, and no retagging is required.

Important Note: The November 2024 RFID rule applies specifically to cattle and bison. Sheep, goats, and swine operate under separate identification programs with their own tag standards. Do not apply cattle 840 RFID tags to small ruminants — these species have their own approved RFID formats.

Official 840 RFID Ear Tag Requirements in Massachusetts

The USDA rule requires that newly applied cattle and bison official ID tags have both a visual and electronic component effective November 5, 2024. The only official tags that currently meet these requirements are 840 RFID tags.

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.” If a tag you are considering does not display all three of these features, it is not an approved official tag.

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 the reader equipment you already use at your farm or local livestock market.

Before you can order 840 tags, you need a Premises Identification Number (PIN). Your premises identification number is required to order. In Massachusetts, contact the MDAR Division of Animal Health at 857-348-3922 or reach the ADT Coordinator, Carry Shulock-Sexton, at [email protected] to register your premises and obtain a PIN.

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. Budget accordingly if you are tagging a large number of animals for the first time.

Species-Specific Ear Tag Rules in Massachusetts

While the 840 RFID rule dominates headlines for cattle producers, each livestock species in Massachusetts operates under its own identification framework. Understanding the differences prevents costly compliance mistakes.

Cattle and Bison

As covered above, any official ear tag applied to cattle or bison on or after November 5, 2024 must be an 840 RFID tag. Cattle tagged with visual-only official tags prior to November 5, 2024, do not need to be retagged unless they lose their ID. If a grandfathered tag falls out, replace it with a new 840 RFID tag and record both the old and new tag numbers.

Sheep and Goats

Under the USDA Scrapie Eradication Program, all categories of sheep and goats entering Massachusetts must have official individual identification. Acceptable ID includes Scrapie Program ear tags, official USDA or country-of-origin RFID ear tags, or registry tattoos accompanied by a current registration certificate. All sheep and goats born in Massachusetts must be officially identified upon leaving their premises of origin or reaching 18 months of age, whichever comes first.

All sheep and goats must have official ID when moving off their premises of origin. This applies whether the move involves a change of ownership or simply transport to a fair, show, or livestock market. Animals required to be identified include all breeding goats and sheep regardless of age when a change of ownership occurs, and all goats and sheep over 18 months of age when a change of ownership occurs.

Swine

All swine must be identified by an official ear tag or registration. Massachusetts regulations under MGL c. 129 §14E and 9 CFR 71.19 govern swine identification. All swine — including pot-bellied pigs classified as “pet” type — imported into Massachusetts must also meet brucellosis testing requirements unless coming from a validated brucellosis-free herd or state.

Llamas, Alpacas, and Camelids

Llamas, alpacas, and dromedary camels must be individually identified by either an ear tag, by registry tattoos accompanied by a current registration certificate, or by a microchip. If a microchip is used, the new owner or exhibitor must have a microchip reader available for private veterinarians, state, or federal regulatory personnel.

Llamas, alpacas, and dromedary camels must have a permit issued by the Massachusetts Division of Animal Health prior to importation. Contact MDAR at 857-348-3922 before moving any camelids into the Commonwealth.

Pro Tip: If you exhibit livestock at Massachusetts fairs or shows, all livestock must have proper official, individual ID as required for the species — for example, an official metal ear tag, tattoo, scrapie tag, or microchip. Bring documentation to the fairground, as officials may verify ID on arrival.

Where to Get Official Ear Tags in Massachusetts

You have several options for sourcing approved ear tags, and the right channel depends on your species and tag type.

For Cattle and Bison (840 RFID Tags)

Official 840 EID tags can be purchased through any distributor of animal products that sells USDA-approved tags. The USDA Animal and Plant Health Inspection Service maintains a list of USDA-approved EID tags on their website. You must have your PIN before placing an order.

Three major manufacturers produce approved 840 tags: Allflex (Dallas, TX), Datamars (Temple, TX), and Y-Tex (Cody, WY). Tags are also available through farm supply retailers and veterinary supply distributors. Many state veterinarian offices distribute free 840 RFID tags to producers, but supply has been uneven. Contact the MDAR Division of Animal Health at 857-348-3922 to ask about any available no-cost tag allocations for Massachusetts producers.

For Sheep and Goats (Scrapie Program Tags)

Official Scrapie ID tags may be obtained from MDAR by contacting Carry Shulock-Sexton at 857-348-3922 or [email protected]. You can also contact USDA APHIS directly.

The National Scrapie Eradication Program provides up to 100 plastic flock ID tags free of charge to first-time participants in the sheep and goat identification program until available funds are expended. Producers will need to purchase the compatible applicator from the tag manufacturer. To request tags or get a flock/premises ID number, call 1-866-USDA-Tag (866-873-2824).

Producers and others who handle sheep or goats in commerce who need additional tags or want a different type or color of tag may purchase official plastic, metal, or RFID tags directly from approved tag manufacturers. A flock or premises ID is required to order tags from these sources.

Only Animal Identification Number Device Managers can redistribute official 840 EID tags. If you are ordering through a third party rather than directly from a manufacturer, confirm that the seller is an authorized AIN Device Manager before purchasing.

How and When to Apply Ear Tags in Massachusetts

Knowing the rules is only half the job — proper tag application protects both the animal and your compliance record. A lost or misread tag can halt a sale or trigger a regulatory hold.

Timing

Apply the official tag well before movement — for example, at processing, preconditioning, or prior to sale or shipment — to avoid delays. Do not wait until the morning of a sale or transport to tag animals. Tag loss discovered at a livestock market creates paperwork problems and can slow the entire transaction.

For Massachusetts-born sheep and goats, the tagging deadline is clear: all sheep and goats born in Massachusetts must be officially identified upon leaving their premises of origin or reaching 18 months of age, whichever comes first.

Placement

Place the tag in the middle third of the ear, between the two cartilage ribs, avoiding blood vessels. Follow brand-specific instructions. Incorrect placement increases the chance of tag loss and can cause unnecessary tissue damage.

Hygiene and Retention

• Clean the applicator and the ear surface before tagging to reduce infection risk.
• Ensure firm closure and check retention before animals leave the chute.
• Inspect tags periodically — especially before any planned movement — and replace lost tags immediately with a new 840 RFID tag if the original was a grandfathered visual tag.
• If you apply a new EID tag to an already officially identified animal, record both tag numbers and the date the new tag was applied.

Who Can Apply Tags

Producers may apply official ear tags themselves in most cases. However, certain tags — such as official vaccination tags for brucellosis — must be applied by an accredited veterinarian or state animal health official. Distribution of NUES tags is handled by federal and state animal health officials and accredited veterinarians. Distribution directly to producers from accredited veterinarians or state and tribal animal health officials is optional and determined by the state.

Ear Tag Requirements for Interstate Movement in Massachusetts

Moving livestock out of or into Massachusetts triggers both state and federal requirements. The two layers do not always overlap perfectly, so you need to satisfy both.

Leaving Massachusetts

Animals leaving Massachusetts must obey the regulations set by the state of destination. Before loading any livestock for an out-of-state move, confirm the destination state’s ear tag and health certificate requirements. Requirements vary significantly — some states have stricter rules than federal minimums. You can find destination-state requirements through USDA APHIS’s traceability resources or by contacting the destination state’s department of agriculture directly.

If you are moving cattle or bison that require official ID under 9 CFR Part 86, those animals must carry a valid 840 RFID tag (if tagged after November 5, 2024) before they cross any state line. Previously, official ID could be a simple visual metal ear tag, a brand registered with a state, or a tattoo from an approved program. Those options remain valid for some purposes, but for interstate movement of covered animals, an 840 RFID tag is now the standard.

Entering Massachusetts

Cattle, swine, goats, sheep, llamas and camelids, horses, and other equines must have valid health certificates issued by an accredited veterinarian within 30 days of import to Massachusetts. All cattle, swine, sheep, and goats must be identified by an official USDA ear tag, or by a tattoo issued by a breed or other recognized registry and accompanied by proof of registration.

An advanced notice of entry is required for cattle. An Advanced Notice to Bring in Cattle is required. Call Carry Shulock-Sexton at 857-348-3922 for cattle entry permits before your shipment departs. For camelids, llamas, alpacas, and dromedary camels must have a permit issued by the Massachusetts Division of Animal Health prior to importation.

Animals from herds, droves, or flocks under quarantine or from areas under quarantine for any disease will not be allowed entry. Verify the disease status of the herd of origin before completing any purchase that involves transport into Massachusetts.

For producers who also move livestock through neighboring states, check out the livestock trailer requirements in Pennsylvania and livestock trailer requirements in New York to make sure your transport setup meets regional standards as well.

Pro Tip: While APHIS focuses on interstate movement of livestock, states and tribal nations remain responsible for the traceability of livestock within their jurisdictions. Massachusetts intrastate movement rules may differ from federal interstate rules — always confirm with MDAR for in-state transport questions.

Recordkeeping Requirements for Ear-Tagged Animals in Massachusetts

Ear tags are only as useful as the records attached to them. Both state law and federal program rules require you to maintain documentation that allows officials to trace any tagged animal back to its premises of origin.

Massachusetts State Requirements

Massachusetts law mandates proper identification and record-keeping for livestock to support disease control and traceability. Under Massachusetts General Laws Chapter 129, Section 19, livestock owners must maintain accurate records of births, sales, and deaths. These records are essential for tracking disease outbreaks and ensuring public health.

Federal Scrapie Program Records (Sheep and Goats)

Records must be kept for five years after the animal is sold or otherwise disposed of. Producers should keep records in an electronic format, such as a spreadsheet. The required data points include:

• The flock ID number of the flock of origin and the name and address of the current owner
• The name and address of the owner of the flock of birth, if known, for animals born in another flock
• The breed and class of the animals (cull ewes, feeder lambs, breeding does, etc.)
• The official ID numbers applied to each animal, or the Group Identification Number (GIN) for a group or lot
• Whether the animals were identified with “Slaughter Only” or “MEAT” tags
• The date the animals were officially identified and the number of identified sheep and goats.

Federal ADT Records (Cattle and Bison)

USDA APHIS clarified certain record retention and record access requirements as part of the November 2024 rule. Producers moving cattle or bison interstate must retain records of official identification numbers, the date of tagging, and the premises where the animal was tagged. If you replace a lost tag, record both the original and replacement tag numbers along with the date of replacement.

Animal disease traceability information is housed in official federal and state databases. Those databases are not publicly available. Your records stay with you — they are not automatically uploaded anywhere — but they must be available for inspection by state or federal animal health officials on request.

Tag numbers are premises-specific and cannot be shared. Scrapie numbers are assigned to your premises. They cannot be shared. This same principle applies to 840 AIN tags — each tag number is tied to the premises PIN used to order it.

For more on Massachusetts animal-related regulations, see the rabies vaccine requirements for ferrets in Massachusetts and the rabies vaccine requirements for cats in Massachusetts if you keep companion animals alongside your livestock operation. Massachusetts producers transporting animals to other states should also review livestock trailer requirements in Georgia, livestock trailer requirements in Florida, and livestock trailer requirements in Illinois if those are common destinations for your animals.

Staying Compliant: Key Steps for Massachusetts Livestock Producers

Ear tag compliance in Massachusetts comes down to a handful of concrete actions. Work through this checklist to confirm your operation is covered:

1. Register your premises. Contact MDAR at 857-348-3922 to obtain a Premises Identification Number (PIN). You cannot legally order official 840 RFID tags or most scrapie program tags without one.
2. Identify your covered animals. Determine which animals on your property fall under federal or state ID requirements based on species, age, and intended use.
3. Order the correct tags. Cattle and bison tagged after November 5, 2024 need 840 RFID tags from a USDA APHIS-approved manufacturer. Sheep and goat producers should contact USDA APHIS at 1-866-USDA-TAG for scrapie program tags.
4. Apply tags before movement. Tag animals at processing or preconditioning — not on the day of transport. For Massachusetts-born sheep and goats, tag before the animal leaves your premises or reaches 18 months of age.
5. Maintain records for five years. Keep a log of every tag applied, every animal purchased or sold, and every movement. Store records in a format that is easy to retrieve if an inspector asks.
6. Check destination-state rules before any interstate move. Contact the destination state’s department of agriculture or review the Federal Register final rule for the minimum federal standards that apply to your animals.
7. Notify MDAR for cattle and camelid imports. An advanced notice is required for cattle entering Massachusetts, and camelids need a permit before arrival. Call 857-348-3922 well ahead of your planned shipment date.

Ear tag compliance is not a one-time task — it is an ongoing part of managing a livestock operation in Massachusetts. Regulations evolve, tag technology improves, and disease outbreaks can trigger new traceability requirements with short notice. Make it a habit to check in with MDAR’s Division of Animal Health and USDA APHIS’s animal disease traceability page at least once a year to confirm your practices still meet current standards. Producers who keep clean records and properly tagged animals are far better positioned to respond quickly — and with minimal disruption — if a disease investigation ever reaches their county.