Iowa Livestock Ear Tag Requirements: What Every Producer Needs to Know

Iowa is one of the nation’s top livestock-producing states, and keeping your animals properly identified is not optional — it is a legal obligation tied to both state and federal law. Whether you run a cow-calf operation, a sheep flock, or a swine herd, understanding which animals need official ear tags, what type of tag qualifies, and when tags must be applied can save you from fines, shipping delays, and disease-investigation headaches.

A major shift happened on November 5, 2024, when a new USDA federal rule took effect requiring electronic identification (EID) ear tags for certain cattle and bison moving across state lines. If you have not updated your identification practices since then, this guide will walk you through everything you need to comply — from the federal mandate down to Iowa-specific rules for sheep, goats, and swine.

Which Animals Require Official Ear Tags in Iowa

Not every animal on your Iowa farm needs an official ear tag, but the categories that do are broad enough to affect most producers who sell or move livestock. The November 2024 federal rule did not add any new classes of livestock to official ID requirements — it only changed the type of tag required. The covered categories remain all sexually intact cattle and bison 18 months of age or over, all dairy cattle of any age (including dairy-beef cross calves), cattle and bison of any age used for rodeo or recreational events, and cattle and bison of any age used for shows or exhibitions.

Beyond cattle and bison, sheep and goats have their own identification requirements under Iowa Administrative Code. Iowa Administrative Code Rule 64.202(1) requires official identification for sexually intact sheep of any age imported into Iowa, among other covered categories. For sheep originating from out of state, ear tags that comply with 9 CFR 79.2 are considered official identification in Iowa. For goats, either ear tags or tattoos that comply with 9 CFR 79.2 are considered official identification in Iowa.

Swine imported into Iowa also carry identification obligations. All swine imported into Iowa, except swine consigned directly to a recognized slaughter establishment, swine consigned to a specifically approved auction market, or swine moved under an approved swine production health plan, must have official individual identification. Iowa-raised swine that stay entirely within the state and go directly to a recognized slaughter facility face fewer restrictions, but any swine entering interstate commerce will need proper ID documentation.

Pro Tip: If you are unsure whether a specific animal on your Iowa operation requires official identification, contact the Iowa Department of Agriculture and Land Stewardship (IDALS) Animal Industry Bureau at 515-281-8236 before moving or selling the animal.

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. This is the most significant change to cattle identification requirements in decades, and Iowa producers need to understand exactly what it means for their operations.

USDA APHIS amended the animal disease traceability regulations to require that eartags applied on or after the effective date be both visually and electronically readable in order to be recognized for use as official eartags for interstate movement of cattle and bison covered under the regulations. This requirement applies to official identification placed for any reason, including interstate movement, brucellosis vaccination, and tuberculosis testing.

The good news for Iowa producers who already tagged animals before the rule took effect: cattle tagged with visual-only official tags prior to November 5, 2024, do not need to be retagged unless they lose their ID. Animals that have previous official ID tags in place with the USDA shield present do not have to replace those tags, as they are good for the life of the animal.

There are a few notable exceptions to the EID requirement. Exceptions include cattle moved as a commuter herd with a commuter herd agreement between states or tribes. Cattle staying in Iowa for their lifetime do not need an EID ear tag. But those required to have one based on the ruling and leaving a premise for interstate movement should have one in place when leaving the premise, or can obtain one at an official tagging site.

Important Note: The November 2024 rule applies only to cattle and bison. Sheep, goats, and swine are not subject to this specific EID mandate, though they have their own identification requirements under separate federal and Iowa rules.

Official 840 RFID Ear Tag Requirements in Iowa

The 840 tag is the cornerstone of the new federal identification system. A unique 15-digit number beginning with 840 designates the USA as the animal’s country of origin. Recognized by state and federal agencies and the livestock industry, official USDA 840 ear tags provide a source of animal identification to trace movement and contact points in the event of an animal disease outbreak.

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.” USDA tags have a unique 15-digit number starting with “840,” display the USDA shield emblem, and carry an “Unlawful to Remove” print.

Iowa producers can obtain 840 EID tags in two main forms. USDA continues to provide states with official white “840” EID button tags and orange “840” calfhood vaccination (OCV) button tags for cattle. These tags, if applied by a veterinarian, are maintained and recorded as stated in 9 CFR 86.3. The white button tag is for general official identification, while the orange OCV tag is specifically for brucellosis vaccination documentation.

To order tags through IDALS or a veterinary clinic, you must first have a Premises ID. A Premises ID is required to order EID tags from IDALS or a vet clinic. If you do not have a Premises ID, a Premises Application will need to be completed and submitted to IDALS. You can register your premises and request a Premises ID through the Iowa Department of Agriculture and Land Stewardship Animal Disease Traceability page.

Species-Specific Ear Tag Rules in Iowa

Iowa’s ear tag rules vary by species, and applying the wrong tag type — or skipping identification entirely — can block your animals from entering markets or crossing state lines.

Cattle and Bison: As described above, any cattle or bison covered under the federal ADT rule and moving interstate must carry an 840 RFID tag applied after November 5, 2024. 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 calves under 18 months moving to a feedlot within Iowa are generally exempt unless the destination state requires ID.

Sheep: Iowa sheep identification is governed by the federal National Scrapie Eradication Program. Sheep going to a livestock market or to slaughter are required to have a Scrapie ear tag. Animals under 18 months of age moving directly to a slaughter facility — not through an auction market or dealer — do not require Scrapie ID. All intact breeding sheep, including ewes and rams, must have a scrapies tag. Do not use cattle RFID tags on sheep — small ruminants have their own RFID tags that are separate from cattle tags.

Goats: All sexually intact goats imported into Iowa that are registered, used for exhibition, or have resided on the same premises with or been commingled with sheep must be officially identified with either ear tags or tattoos that meet the requirements specified in 9 CFR §79.2 and §79.3 and the Scrapie Eradication Uniform Methods and Rules. Iowa law also notes that goat official ID requirements may become identical to sheep requirements if a scrapie case in Iowa goats is identified that cannot be attributed to sheep exposure.

Swine: Official individual identification for swine means a unique individual identification that is secure and traceable, including but not limited to a USDA-approved identification ear tag conforming to the alphanumeric national uniform ear tagging system, a USDA-approved premises tattoo, a registered purebred tattoo, or identification conforming to the National Animal Identification System. An owner’s private brand or tattoo, even if permanent and registered in the state of origin, is not acceptable official individual identification for the purpose of entry into Iowa.

Species	Tag Type Required	Key Trigger	Exemptions
Cattle / Bison	840 RFID (post-Nov. 5, 2024)	Interstate movement of covered classes	Beef feeders under 18 months; commuter herds
Sheep	USDA Scrapie ear tag	Market movement or slaughter (over 18 months direct-to-slaughter exempt)	Under 18 months direct to slaughter facility
Goats	Ear tag or tattoo (9 CFR 79.2)	Intact, registered, show animals, or commingled with sheep	Direct consignment to slaughter
Swine	USDA-approved ear tag or premises tattoo	Import into Iowa or interstate movement outside slaughter channels	Direct to recognized slaughter; approved auction; SPHP

Where to Get Official Ear Tags in Iowa

Iowa producers have several channels for obtaining official 840 RFID tags and species-specific identification tags. Your first stop should be IDALS, which distributes USDA-supplied tags to eligible producers.

• IDALS (Iowa Department of Agriculture and Land Stewardship): Contact the Animal Industry Bureau at 515-281-8236 or iowaagriculture.gov/animal-disease-traceability. A Premises ID is required to order EID tags through IDALS.
• Accredited veterinarians and vet clinics: If EID tags are provided to producers to apply themselves, the veterinarian or clinic must become a Tag Distributor and must be authorized by USDA as an AIN tag manager. Many Iowa vet clinics maintain a supply of 840 button tags on hand.
• Approved livestock markets: All approved livestock markets are also approved tagging sites. If an animal arrives at an Iowa market without the required tag, it can be tagged on-site before sale.
• Approved manufacturers and distributors: Three major manufacturers produce approved 840 tags: Allflex (Dallas, TX), Datamars (Temple, TX), and Y-Tex (Cody, WY). Tags are also available through veterinary supply distributors and farm supply retailers.

RFID 840 tags cost between $2 and $5 per tag, depending on the manufacturer, tag style, and order quantity. 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 IDALS directly to ask about the current availability of no-cost tags in Iowa. Also, if you are transporting livestock in Iowa, make sure your ear tag compliance is in order before loading — officers can check identification at weigh stations and inspection points.

Pro Tip: Register your Iowa premises ID before you need tags. Obtaining a premises identification number is completely voluntary in Iowa, and premises identification is done at no cost to the producer. However, a Premises ID is a prerequisite for ordering official EID tags through IDALS or a vet clinic, so registering early avoids delays when you need tags quickly.

How and When to Apply Ear Tags in Iowa

Proper tag application is just as important as using the correct tag type. A tag applied incorrectly can fall out, become unreadable, or cause ear damage — any of which can create a compliance problem at a market or state border.

For 840 RFID button tags, the button (electronic component) goes on the inside of the ear, and the visual tag piece sits on the outside. The tag is placed on the outside of the animal’s ear, visible from behind the animal. Most manufacturers include a placement guide with their applicator tools; use the correct applicator for the specific tag brand to ensure a clean, secure application.

Timing matters for compliance. The general rule is that an animal must be tagged before it leaves your premises for interstate movement — or it can be tagged at an approved tagging site upon arrival. Animals required to have an EID tag and leaving a premise for interstate movement should have one in place when leaving the premise, or can obtain one at an official tagging site. For brucellosis vaccination, the new official brucellosis identification is an orange RFID button, placed in the right ear by the herd veterinarian at the time of vaccination.

If a tag is lost after application, it must be replaced. If a tag is lost, it can be replaced with permission with a new EID tag. The new tag number should be recorded, along with the date and location of the replacement. If the old number is known, that should be noted as well. Replacement tags require the same Premises ID and recordkeeping steps as original tags.

For sheep and goats, apply Scrapie tags or 9 CFR 79.2-compliant tags before the animal moves to a market, auction, or out of state. For swine moving interstate, ensure official individual identification is in place and documented on the Certificate of Veterinary Inspection (CVI) before transport. Producers in Iowa planning interstate shipments should review livestock trailer requirements in Illinois, livestock trailer requirements in Wisconsin, and livestock trailer requirements in Missouri — Iowa’s neighboring states — since ear tag and CVI requirements differ at each destination.

Ear Tag Requirements for Interstate Movement in Iowa

Moving livestock out of Iowa triggers the full weight of both federal ADT rules and the receiving state’s own requirements. The federal rule specifies that ear tags for all sexually intact cattle and bison 18 months of age or older, all dairy cattle, cattle and bison of any age used for rodeo or recreation events, and cattle or bison of any age used for shows or exhibition must be both visually and electronically readable in order to be recognized for use as official identification for interstate movement.

Iowa producers shipping cattle to states like Nebraska, South Dakota, or Minnesota must ensure their animals carry a valid 840 RFID tag. The new USDA final rule does not change which cattle receive official ear tags; it only changes which ear tags are considered official. Animals that were already tagged with a compliant visual-only tag before November 5, 2024, remain grandfathered in for the life of the animal.

For species other than cattle and bison, interstate movement requirements vary. Sheep and goats must meet Scrapie program requirements, and the receiving state may have additional demands. When filling out health papers for movement to a new premises, find out where the animals are going, then call the state of destination for the rules for that particular species. Never assume that Iowa’s rules match the destination state’s rules.

Swine moving across state lines face some of the most detailed documentation requirements. All swine imported into Iowa must originate from a herd or area not under quarantine. The same standard applies in reverse when Iowa swine leave the state — the receiving state will check for official individual ID and a valid CVI. Producers shipping to nearby states should also check livestock trailer requirements in Kansas, livestock trailer requirements in South Dakota, and livestock trailer requirements in Nebraska to stay compliant on the road.

Important Note: Some states have additional RFID or health testing requirements beyond the federal baseline. Always contact the destination state’s animal health authority before shipping livestock across state lines to confirm current entry requirements.

Recordkeeping Requirements for Ear-Tagged Animals in Iowa

Tagging your animals is only half of the compliance equation. Federal and Iowa rules both require that you maintain records linking each tag number to a specific animal, movement event, and premises — and those records must be available for inspection during a disease investigation.

Under the federal ADT rule, tag information is recorded when tags are applied, at selling points, when official movements are recorded, and when a disease investigation is being conducted. Iowa producers who receive 840 EID tags through IDALS or a vet clinic must ensure that tag numbers are linked to their Premises ID in the distribution system at the time of issuance.

For sheep and goat operations, Iowa’s scrapie program sets explicit recordkeeping timelines. Producers are required to maintain records for five years on all animals requiring official ID that enter or depart from their flocks. Records must include the name and address and Scrapie Flock number of the other party, and the flock of origin of the animal.

When a tag is lost and replaced, your records must reflect the change. The new tag number should be recorded, along with the date and location of the replacement. If the old number is known, that should be noted as well. Keeping a simple logbook or digital spreadsheet with this information — organized by animal and date — satisfies most audit requirements and makes disease tracing faster if your herd is ever investigated.

Iowa premises registration ties directly into recordkeeping. Premises identification involves recording information such as addresses, names of contacts, the type of premises, and a contact phone number. This information is maintained by IDALS, and key pieces are shared with USDA to be available for animal disease tracing purposes. Keeping your premises information current with IDALS ensures that any tag numbers linked to your PIN can be traced back to you accurately.

For producers who also transport their own animals, thorough tag records complement your transport documentation. Review Iowa’s livestock transportation laws to make sure your shipping paperwork, CVIs, and ear tag records are all aligned before you hit the road. Producers operating across multiple states may also find it useful to compare requirements in states like Wyoming, Oklahoma, and Georgia when planning longer hauls.

Staying current with Iowa ear tag requirements protects your animals, your operation, and the broader livestock industry. The November 2024 federal EID rule was a major change, but the underlying goal — rapid traceability during a disease outbreak — benefits every producer in the state. Register your premises, order your 840 RFID tags before you need them, keep clean records, and verify destination-state rules before any interstate shipment.