Livestock Biosecurity Requirements in Wyoming Every Producer Should Know

Wyoming’s cattle and sheep operations anchor one of the most agriculturally significant economies in the American West, and the diseases that threaten them do not respect property lines or state borders. A single biosecurity lapse — an unregistered premises, a poorly quarantined new arrival, or an improperly disposed carcass — can trigger herd losses, trade restrictions, and regulatory action that ripples far beyond one ranch.

If you raise livestock in Wyoming, understanding your biosecurity obligations under state and federal rules is not optional. This guide walks you through each major requirement, from premises identification and animal movement controls to visitor sanitation, wildlife management, and dead animal disposal, so you can protect your herd and stay compliant with Wyoming Livestock Board (WLSB) standards.

What Is Livestock Biosecurity and Why It Matters in Wyoming

Biosecurity is another way of saying “infectious disease control” — it refers to everything done to keep diseases and the germs that cause them (viruses, bacteria, fungi, parasites, and other organisms) away from your animals, property, and the people who interact with them. For Wyoming producers, that definition carries real economic weight.

Animal agriculture in Wyoming is dominated by cattle and sheep operations, with the state ranking 14th in cattle inventory and 4th in sheep inventory among the 50 states. Protecting that inventory means taking biosecurity seriously at every stage of production.

The Wyoming Livestock Board Animal Health Unit exercises general supervision over and protection of the livestock interests of the state from disease by implementing board rules and regulations, assisting in enforcement, monitoring the import of livestock and biologic agents into the state, and disseminating lawful and accurate information. That oversight framework exists because disease outbreaks are not just a herd-health problem — they are a trade and economic problem.

Past outbreaks of highly contagious disease have crossed state boundaries, and future serious disease outbreaks will almost certainly do so as well. Wyoming’s position as a major livestock-producing state means your biosecurity decisions affect neighboring operations, interstate commerce, and the state’s standing in national and international markets.

Biosecurity is important whether your animals are on your farm, moving from one production site to another, going to auction, or participating in a show or event — and it not only protects you and your animals, it also protects your neighbors, employees, and consumers. Understanding the specific rules Wyoming enforces is the foundation of any effective biosecurity program. You can also review how livestock disease reporting works in Colorado for a neighboring-state comparison.

Premises Registration and Identification Requirements in Wyoming

Before you can implement effective biosecurity, your operation needs to be registered and identifiable within the national animal health system. Wyoming participates in the USDA Animal Disease Traceability (ADT) program, and premises registration is the foundational step.

A livestock operation needs a federal Premises Identification Number to participate in animal disease traceability and control activities that require USDA Animal and Plant Health Inspection Service (APHIS) oversight or involvement. APHIS assigns a Premises Identification Number to a livestock operation when the contact information, physical location, and type of operation are verified in the USDA emergency management mapping system.

Verified premises, along with animal IDs and interstate movement records, establish the ability of livestock operators and animal health officials to rapidly determine what types of livestock in which locations might have been exposed if catastrophic disease that will impact international trade is discovered. In practical terms, your PIN is the key that unlocks your participation in disease response, indemnity programs, and official identification systems.

A premises identification number (PIN) or location identifier (LID) is a unique code permanently assigned to a physical location and is required to purchase official animal identification tags. You can request a PIN through the WLSB or the USDA/APHIS Cheyenne office at 307-432-7960.

On the animal identification side, USDA amended the animal disease traceability rule in relation to official identification requirements for cattle and bison moving interstate, with these requirements taking effect on November 5, 2024. Under the updated rule, official eartags sold for or applied to cattle and bison must be both electronically and visually readable.

For sheep and goats, the WLSB enforces scrapie identification requirements. Exhibition sheep and goats have their own scrapie ID rules, which you should confirm directly with the WLSB before any show or sale. You can also review how livestock disease reporting is handled in Michigan to understand how other states approach traceability compliance. For brand inspection rules in a neighboring state, see this overview of brand inspection requirements in Washington.

Biosecurity Plan Requirements in Wyoming

Wyoming does not currently mandate a single standardized written biosecurity plan for all livestock operations the way some states do for poultry or swine. However, several regulatory frameworks effectively require producers to operate with biosecurity planning built in — particularly when dealing with disease-prone species, regulated diseases, or high-risk activities like importing animals.

A good biosecurity program should address the prevention of disease entry and spread on a farm, stable, or home — and livestock owners should contact their regular veterinarian to discuss what appropriate measures should be implemented on their specific operation. The WLSB actively encourages producers to develop written plans as part of their animal health management.

For swine operations specifically, Wyoming has placed additional requirements on swine CAFOs in the state. To apply for a swine CAFO permit, the applicant must develop a construction plan, operation plan, animal waste management plan, and financial assurance plan. These planning requirements reflect the higher biosecurity risk profile of concentrated swine operations.

Your biosecurity plan should address, at minimum, the following core areas:

• Isolation protocols for incoming animals
• Traffic control for vehicles and visitors
• Cleaning and disinfection schedules for equipment and facilities
• Wildlife and pest exclusion measures
• Dead animal disposal procedures
• Recordkeeping for animal movements, health events, and treatments
• Disease reporting contacts and procedures

If any person or government entity knows or suspects that there is a contagious or infectious disease among animals under their jurisdiction, or any veterinarian knows of or suspects a reportable disease, he or she must report it to the State Veterinarian’s office within 24 hours. Your biosecurity plan should include the WLSB disease reporting line (307-840-1389) as a standing reference.

For producers who want to understand how disease reporting obligations work in other states as a benchmark, see these resources on livestock disease reporting in Florida and livestock disease reporting in California.

Animal Isolation and Movement Control Requirements in Wyoming

Controlling how animals move onto, off of, and around your premises is one of the most effective biosecurity tools available to you. Wyoming enforces strict import requirements and expects producers to maintain isolation protocols for newly arrived animals.

Interstate Import Requirements

Commonly used WLSB Animal Health Rules include Chapter 8 (Import Regulations), which covers cattle, bison, yak, horses, sheep, goats, and swine. All livestock entering Wyoming from another state must comply with Chapter 8, which specifies health testing, official identification, and Interstate Certificates of Veterinary Inspection (ICVI) requirements by species.

Key import requirements by species include:

• Cattle and Bison: Brucellosis testing requirements apply based on origin and herd status. Tuberculosis testing is required for dairy cattle six months of age and older.
• Sheep and Goats: The ICVI must include a statement that all animals in the shipment are free from Foot Rot and Ring Worm (Club Lamb Fungus) and originate from a flock or herd that has not had Scrapie in the past five years.
• Swine: Brucellosis testing requirements apply regardless of other conditions.
• Camelids: An ICVI is required on all Camel Family Species entering Wyoming.

On-Farm Isolation Protocols

Once animals arrive, isolation is your primary tool for preventing disease introduction into your existing herd. Do not cross-use shovels, feed buckets, brushes, or other equipment between isolated animals and other livestock. Ensure workers clean their hands and boots and change clothes prior to entering other areas.

A standard isolation period for newly arrived animals is a minimum of 21 to 30 days, during which time you should monitor for clinical signs, complete any required testing, and avoid commingling with resident animals. Isolate animals once on your property, use your own trailer to transport your animals, and if you do not have your own transportation, it is crucial to disinfect all returning animals’ hooves prior to entering your barn or stable.

Commuter Permits and Interstate Movement

Wyoming offers a Commuter Permit system for livestock that regularly cross state lines during normal management operations. Animals may move with an ICVI and a copy of the Commuter Permit, but Commuter Permits do not waive any brand inspection requirements. Contact the WLSB to confirm current commuter permit eligibility for your operation.

For a detailed look at how livestock trailer compliance works in neighboring states, see these guides on livestock trailer requirements in Nevada and livestock trailer requirements in Pennsylvania.

Visitor, Vehicle, and Equipment Sanitation Rules in Wyoming

People, vehicles, and equipment are among the most common vectors for disease introduction onto a livestock operation. Wyoming’s biosecurity framework — reinforced by WLSB guidance and USDA best practices — sets clear expectations for how you manage access to your premises.

Visitor Controls

Producers are encouraged to practice good biosecurity on their farms, such as limiting visitors and excluding any wild birds or animals from the dairy or livestock facility. For operations with higher biosecurity risk profiles — such as swine, poultry, or brucellosis surveillance area cattle — limiting visitor access is not just a recommendation but a practical necessity.

Ensuring everyone at your facility understands biosecurity is critical. Anyone regularly interacting with your animals, including family members, should have proper training on how to cleanly enter animal housing areas. For some facilities such as swine or poultry operations, this may mean completely showering in and showering out. For other livestock facilities, this may mean changing outerwear and using disposable boot covers.

You should also be aware of international travel risks. Do not allow anyone who was recently in a country where foreign animal diseases are present to have contact with your livestock or poultry for at least five days after they return to the United States, and do not allow anyone to wear clothing they wore outside the United States around your livestock.

Vehicle and Equipment Sanitation

Biosecurity measures can include cleaning vehicles and equipment, changing clothes upon contact with birds, and limiting visitors. This applies equally to cattle, sheep, and swine operations — any vehicle that has been on another livestock premises is a potential disease carrier.

The normal ins and outs for your facility can bring diseases to your animals. This includes trucks accidentally carrying germs to your facility as they come and go during the normal business day — delivering feed, removing dead animals, bringing replacement animals, and so on. Reduce this risk by clearly establishing clean and dirty areas where these vehicles are and are not allowed.

Livestock or poultry facilities can further reduce risk by having vehicles go through cleaning stations before coming on the premises. At minimum, require that vehicles entering your core animal areas be visibly clean and free of manure or organic material from other operations. Keep a log of all visitor and vehicle entries as part of your biosecurity recordkeeping.

Wildlife and Pest Control Obligations in Wyoming

Wyoming’s open landscapes and abundant wildlife populations create biosecurity challenges that producers in more densely settled states rarely face. Brucellosis, plague, chronic wasting disease spillover risk, and avian influenza all have documented wildlife reservoirs in Wyoming, making wildlife and pest exclusion a genuine regulatory and operational priority.

Brucellosis and Wildlife Interactions

The WLSB maintains a Brucellosis Designated Surveillance Area (DSA) in portions of Wyoming where free-ranging bison and elk serve as a reservoir for Brucella abortus. If your operation falls within or adjacent to the DSA, you face heightened testing and movement requirements under Chapter 2 of the WLSB Animal Health Rules. Minimizing contact between your cattle and wildlife — particularly elk and bison — is both a regulatory obligation and a practical necessity in these zones.

Avian Influenza and Poultry

Migratory waterfowl are the primary source for avian influenza. Wild birds can be infected and appear healthy, but shed virus in feces, saliva, and respiratory secretions. Domestic poultry become infected through direct contact with infected wild birds, or through contact with contaminated objects, equipment, or the environment.

Domestic poultry should not be allowed contact with wild waterfowl. Poultry located near canals, ponds, rivers, or other bodies of water are at increased risk of exposure, especially during migration periods. The Wyoming Game and Fish Department (WGFD) tracks wild bird HPAI detections across the state and posts location data on its website — monitor those reports as part of your seasonal biosecurity planning.

Plague Awareness

Plague is present throughout much of Wyoming. Serosurvey results from 2005 to 2008 showed that counties in the Big Horn Basin had prevalence figures in the 22 to 40 percent range. While plague primarily affects rodents and the predators that consume them, it poses a risk to working dogs on livestock operations — including livestock guardian dogs. Plague has been documented in animals in every county in the state, and veterinarians and veterinary clinic staff throughout Wyoming are reminded to take precautions when working around a suspect plague case.

General Pest Control

Rodents, flies, and other pests serve as mechanical vectors for a range of livestock pathogens. Your biosecurity plan should include a pest management component that addresses:

• Rodent exclusion and baiting programs around feed storage and animal housing
• Fly control measures, particularly during summer months
• Elimination of standing water that attracts disease-carrying insects and waterfowl
• Secure feed storage to avoid attracting wildlife onto your premises

Dead Animal Disposal Requirements in Wyoming

Proper carcass disposal is both a biosecurity requirement and a legal obligation in Wyoming. Improperly disposed carcasses attract scavengers, contaminate water sources, and can serve as ongoing disease reservoirs — particularly for operations in brucellosis surveillance areas or those dealing with reportable disease events.

Standard Disposal Methods

Wyoming allows several methods for disposing of livestock carcasses on-farm. Accepted methods generally include:

• Burial: Carcasses must be buried deep enough to prevent scavenger access and located away from water sources, wells, and drainage areas. Check with your county and the Wyoming Department of Environmental Quality (DEQ) for any site-specific setback requirements.
• Composting: On-farm composting of carcasses is permitted when done correctly. Proper carbon-to-nitrogen ratios, adequate pile temperatures, and appropriate site selection are critical to ensure pathogen destruction and regulatory compliance.
• Rendering: Contracting with a licensed rendering facility is an approved disposal method and is often the preferred option for large animals or operations near population centers.
• Incineration: Permitted in some circumstances, subject to DEQ air quality requirements and local ordinances.

Disease-Related Disposal Obligations

When a reportable disease is suspected or confirmed, carcass disposal moves from a routine management decision to a regulated activity under WLSB and potentially USDA APHIS oversight.

WLSB Staff Veterinarians shall discuss with producers disease signs, symptoms, and precautions if any dead animals, regardless of mammalian species, are found on their premises. If you discover unusual deaths — especially multiple deaths in a short period — contact the WLSB disease reporting line at 307-840-1389 before disposing of any carcasses. Premature disposal can destroy diagnostic samples needed to identify the cause of death.

A quarantine order may be issued to the animal owner to prevent movement of any animals from the premises when a Category A or B disease is suspected. Under those conditions, disposal of carcasses must be coordinated with the State Veterinarian’s office and may require on-site burial, incineration, or rendering under regulatory supervision.

Recordkeeping for Disposal

Maintain written records of all carcass disposal events, including the date, species, estimated age and weight of the animal, cause of death (if known), disposal method used, and disposal location on your property. These records support your biosecurity plan documentation and may be requested by WLSB inspectors or required as part of any disease investigation.

Properly removing dead animals and animal waste is a core biosecurity function. Dead animals and animal waste should be removed from areas housing live animals as quickly as possible, using a separate entrance or exit from the one used to bring live animals into the facility. This separation helps prevent cross-contamination between the disposal pathway and the live animal housing area.

For additional context on how other states manage livestock disease reporting and response — which directly informs disposal obligations — see these resources on livestock disease reporting in Illinois and livestock disease reporting in Colorado.

Staying Compliant With Wyoming’s Livestock Biosecurity Framework

Wyoming’s livestock biosecurity requirements span multiple agencies and regulatory chapters, but the core obligations are straightforward: register your premises, identify your animals properly, control what enters and leaves your operation, manage wildlife and pest risks, and dispose of carcasses responsibly.

The WLSB is your primary regulatory contact for animal health matters in Wyoming. All information collected in response to the reportable disease list shall remain confidential, so you can report concerns without fear of unnecessary public disclosure. Keep the disease reporting line (307-840-1389) accessible to everyone on your operation.

Biosecurity is not a one-time compliance exercise — it is an ongoing management commitment. Review your biosecurity plan at least annually, update it when new animals, employees, or facilities are added, and stay current with WLSB rule changes. As recently as January 7, 2026, the Governor approved new Chapter 15 Trichomoniasis rules, a reminder that Wyoming’s animal health regulatory environment continues to evolve. Staying informed protects your herd, your neighbors, and Wyoming’s livestock industry as a whole.