Swine Ear Notching Laws in Alabama: What Every Pig Owner Needs to Know
August 27, 2026
If you raise pigs in Alabama — whether on a small family farm, a purebred breeding operation, or as part of a 4-H or FFA project — understanding swine ear notching is one of the most practical skills you can develop. Ear notching is a permanent, low-cost method of identifying individual pigs that has been used across the United States for generations, and it remains relevant under both state and federal identification rules today.
Alabama’s swine identification requirements sit at the intersection of state administrative code and USDA federal regulations, and knowing where ear notching fits — and where it falls short — can save you real headaches at the sale barn, the show ring, or the state line. This guide walks you through how the system works, when it qualifies as official identification, and how it stacks up against ear tags, tattoos, and RFID in Alabama’s regulatory environment.
What Is Swine Ear Notching and When It Is Used in Alabama
Ear notching is a permanent identification method applied to pigs shortly after birth. It involves cutting small, precise notches into the edges of a pig’s ear using a specialized notching tool, with each notch position representing a different number and the combination of notch locations creating a unique identifier for each animal. The result is a lifelong, tamper-proof ID that travels with the pig no matter where it goes.
Ear notching provides a permanent ID system for individual animals, serves as an inexpensive means of identification, and enables producers to keep an accurate set of records. For Alabama pig producers, this matters whether you are managing a commercial sow herd, running a purebred Berkshire or Duroc operation, or preparing a market hog for the county fair.
If pigs are notched at one to three days of age, the task is much easier. If you allow pigs to become large — around 100 pounds — the task becomes considerably more demanding mentally and physically. Most Alabama producers notch at the same time they dock tails and clip needle teeth, making it a natural part of the newborn pig routine.
Pig operations frequently use ear notching alongside tags because pigs are prone to removing tags. That combination approach — notching plus a physical tag — is common on Alabama farms and provides a useful backup if a tag is torn out.
Pro Tip: Notch piglets within the first one to three days of birth. The ears are soft, healing is fast, and the procedure causes minimal stress compared to notching older, heavier pigs.
When Ear Notching Qualifies as Official Identification in Alabama
Not every notch pattern on a pig’s ear counts as “official” identification under Alabama or federal rules. There is an important distinction between using ear notching as a farm management tool and using it as a legally recognized form of official ID for movement, sale, or exhibition.
Official identification is a method or device approved by the USDA/APHIS Administrator and the State Veterinarian that assigns a nationally unique number to an animal or group of animals that can be traced by the State Veterinarian to the point of application or subsequent movement. Ear notching alone does not automatically meet that standard.
Ear notching of any swine qualifies as an approved identification method only if the ear notching has been recorded in a purebred registry association’s book of record. If your notch pattern is not registered with a recognized breed association, it functions as an on-farm management tool — useful for your own records, but not accepted as official ID for interstate movement or regulated events.
For swine coming into Alabama from other states, the requirements are clear. Swine coming to Alabama must have a Certificate of Veterinary Inspection (CVI) and a statement from the accredited veterinarian confirming the animals do not originate from a premises quarantined for PEDv. The CVI must include a premises number if known, and adult breeding animals must have official ID. If your breeding animals rely on ear notching as their official ID, those notches must be backed by purebred registry documentation.
Any person, entity, marketing agent, or accredited veterinarian who distributes or applies official identification identifiers must maintain a record of names and addresses of anyone to whom the devices were distributed or applied for five years. Keep your paperwork organized from the start — it protects you if questions arise later.
How the 1-3-9 Ear Notching System Works
The most common notching system is the 1-3-9 system. It is the standard used by most purebred registries, 4-H programs, and extension services across Alabama and the rest of the United States. Once you understand the logic, reading a pig’s ear becomes straightforward.
The system divides each ear into zones, with each zone assigned a numeric value. The right ear has five locations for notches, and each location is assigned a number: 1, 3, 81, 9, or 27. The left ear has three locations for notches, and each location is assigned a number: 1, 3, and 9.
The two ears serve different purposes. The right ear is used for the litter mark, and all pigs in the same litter must have the same notches in this ear. The left ear is used for notches to show an individual pig’s number in the litter, and each pig will have different notches in the left ear. Together, the two ears create a unique identity for every pig born on your farm.
To read a pig’s number, you simply add up the values of the notches in each ear. To determine the litter number for a pig, add the numerical values assigned to each notch in the right ear. For example, notches in the 3 and 9 positions on the right ear give you litter number 12. A notch in the 3 position on the left ear identifies that pig as individual number 3 — making the full identity “12-3.”
| Ear | Purpose | Zone Values Available | Max Notches per Zone |
|---|---|---|---|
| Right ear (pig’s right) | Litter number | 1, 3, 9, 27, 81 | 2 (except 81 — max 1) |
| Left ear (pig’s left) | Individual pig number | 1, 3, 9 | 2 per zone |
In zones 1, 3, 9, and 27, there can only be two notches; if there are two notches in all four zones, that represents litter 80. A notch in zone 81 basically doubles the system, extending the range well beyond what most operations will ever need.
One practical tip worth remembering: the reference to left and right ear refers to the pig’s left or right ear as viewed from the rear of the pig — not the viewer’s left or right when the pig is facing them. A good way to avoid confusion is to always look the pig in the face; read left-to-right, and it will always be litter number then pig number.
Pro Tip: Disinfect your V-notcher between litters using fresh surgical spirit or alcohol. Keeping equipment clean prevents infection and ensures notches heal cleanly — especially important in Alabama’s warm, humid climate where wounds can be slow to heal.
Ear Notching for Purebred Registry Compliance in Alabama
If you raise registered purebred swine in Alabama — Berkshire, Duroc, Hampshire, Yorkshire, Landrace, Poland China, or Spotted — ear notching is likely a requirement of your breed association, not just a management preference. The simplest method and the one recommended by most breed associations is ear notching.
Ear notches, using the Universal Ear Notching System, must be recorded with a breed registry association, and breed registration papers must accompany the animals for the notch to carry any official weight. Without that registration record, the notch is invisible to regulators and show officials from a compliance standpoint.
This matters practically for Alabama producers who sell registered breeding stock, enter animals in state fairs or breed shows, or move purebred animals across state lines. Ear notching qualifies as official identification only if the ear notching has been recorded in the book of record of a purebred registry association. Your registration paperwork is what converts a physical notch into a legally recognized identifier.
Youth producers participating in Alabama 4-H and FFA programs also rely on the notching system. Youth involved in showing pigs learn responsibility and animal husbandry through identification and recordkeeping. County extension offices across Alabama can help first-time notchers learn the system correctly before they apply it to their project animals.
For operations showing pigs at National Swine Registry or National Junior Swine Association events — including events that may draw Alabama exhibitors — the identification requirements go further. The National Swine Registry requires all animals exhibited at NSR or NJSA events to be identified with an official, permanently-numbered ear tag in addition to any registry notching. Check with your specific breed association and show management to confirm what combination of ID is required before you load up the trailer.
Important Note: Registration papers must physically accompany your animals when ear notching is being used as official ID. Leaving paperwork at home — even for a short trip to a sale barn or show — can result in your animals being turned away or held for inspection.
Ear Notching vs. Ear Tags, Tattoos, and RFID in Alabama
Ear notching is one of several identification methods available to Alabama swine producers, and each has distinct strengths, limitations, and regulatory applications. Choosing the right method — or the right combination — depends on what you are using the animal for and where it is going.
| Method | Permanent? | Qualifies as Official ID? | Best Use Case in Alabama |
|---|---|---|---|
| Ear notching | Yes | Yes — if recorded with purebred registry | Purebred breeding stock, show pigs, farm records |
| Official ear tag (NUES/840) | No (can be lost) | Yes — approved for interstate movement | Interstate movement, slaughter, commercial sales |
| Tattoo | Yes | Yes — if recorded with registry association | Purebred registry, exhibition, breeding stock |
| RFID (840 tag) | No (electronic) | Yes — USDA approved | Shows, traceability programs, sow operations |
| PIN tag (premises tag) | No | Yes — for cull breeding/slaughter swine | Cull sows and boars entering harvest channels |
There are two broad categories to keep in mind: permanent identification, which stays with the animal for life (such as tattoos, branding, and ear notching), and semi-permanent or temporary identification, which can be lost or replaced (such as ear tags). Pig operations frequently use ear notching alongside tags because pigs are prone to removing tags — a real concern for Alabama producers who run pigs on pasture or in group housing where ear tags can snag and tear out.
Tattoos offer a similar permanence to notching. Tattoos on the ear or inner flank of any swine qualify as official identification if the tattoos have been recorded in the book of record of a swine registry association. However, tattoos require close inspection to read — animals must be caught and the ear cleaned — and the marks can fade over time, particularly on darker-skinned animals.
RFID technology is expanding rapidly in the swine industry. APHIS is offering no-cost radio frequency identification (RFID) eartags to eligible swine producers, and this program is designed to enhance the speed and accuracy of disease response efforts across the swine industry. These tags are intended for use in the sow and exhibition swine sectors. Alabama producers with a valid Premises ID number may be eligible to participate — contact the Alabama Department of Agriculture and Industries for details.
For slaughter and feeder swine specifically, an eartag or tattoo bearing the Premises Identification Number assigned by the State Animal Health Official to the premises on which the swine originated is the standard official ID method. Ear notching alone does not satisfy this requirement for animals moving in commercial slaughter channels.
If you raise and sell pigs in Alabama, you may also want to review the state’s transporting livestock laws in Alabama to understand how identification requirements interact with movement rules on the road.
State-Specific Swine Identification Rules That Affect Ear Notching in Alabama
Alabama’s swine identification framework is governed by the Alabama Department of Agriculture and Industries (ADAI) under Administrative Code Rule 80-3-6, which aligns closely with USDA/APHIS federal standards. Understanding both layers is essential if you move pigs within or across state lines.
Livestock identifiers distributed by the State Veterinarian’s office are assigned to a Premises ID or Farm Location number. If you do not yet have a Premises ID for your Alabama property, obtaining one is the first step before applying any official identification to your swine. Contact the Alabama Department of Agriculture and Industries Animal Industries division to register your premises.
Official identification is required when ownership occurs within the state of Alabama. Official identification is a method or device approved by the USDA/APHIS Administrator and the State Veterinarian that assigns a nationally unique number to an animal or group of animals traceable to the point of application or subsequent movement.
For swine moving interstate into Alabama, the rules are specific. Swine coming to Alabama must have a Certificate of Veterinary Inspection and a statement from the accredited veterinarian that the animals do not originate from a premises quarantined for PEDv. The CVI must include a premises number if known, and adult breeding animals must have official ID. If ear notching is the chosen official ID method, it must be backed by valid purebred registry documentation.
Each state in which the NSR or NJSA hosts events has regulations for animal health and the identification of swine that move across state lines to come to shows, and some states may also have additional regulations for swine being transported for shows and sales. These regulations vary from state to state. Always verify current requirements with the Alabama State Veterinarian’s office and the specific event organizer before traveling with show pigs.
Alabama producers should also be aware that traceability requirements continue to evolve at the federal level. The federal traceability rule does not change the current requirements for the identification and movement of swine interstate. Swine that are moved interstate must currently meet identification requirements under Title 9, Part 71.19 of the Code of Federal Regulations. Staying current with APHIS guidance ensures your ear notching practices remain compliant as the regulatory landscape shifts.
Key Insight: Alabama’s swine ID rules apply not just to large commercial operations. If you sell even a single registered pig at a show or move breeding stock across a state line, official ID requirements apply to you. When in doubt, call the ADAI Animal Industries division before the animal leaves your farm.
Swine identification is just one piece of the broader picture of animal ownership rules in Alabama. If you also keep goats, chickens, or other livestock, you may find it helpful to review goat ownership laws in Alabama and backyard chicken laws in Alabama for a fuller picture of what the state requires. Producers who import animals from other states should also consult the pet import laws in Alabama page for general guidance on CVI and entry requirements, and those transporting animals on public roads will want to review Alabama’s livestock transport rules in full.
For additional authoritative guidance, the USDA APHIS swine identification reference guide provides a full breakdown of approved identification methods under federal rules, and the Alabama Administrative Code Rule 80-3-6 is the primary state-level authority governing official livestock identification in Alabama. The University of Nebraska-Lincoln Extension guide on ear notching and the New Mexico State University ear notching guide are both practical references for mastering the 1-3-9 system technique. The National Swine Registry ear tag page is the best starting point for producers whose pigs will be exhibited at NSR or NJSA events.