Livestock Biosecurity Requirements in Maine: What Every Producer Needs to Know

Maine livestock producers face real and evolving disease pressures — from Highly Pathogenic Avian Influenza detections to Eastern Equine Encephalitis confirmed in horses and pigs. A single biosecurity lapse can cost you an entire herd, trigger state-mandated quarantines, and expose you to regulatory penalties that no farm budget can easily absorb.

Understanding the livestock biosecurity requirements in Maine is not optional — it is a core part of operating a compliant, resilient farm. This guide walks you through every major obligation, from registering your premises and writing a biosecurity plan to controlling wildlife, sanitizing equipment, and properly disposing of animal carcasses under Maine law.

What Is Livestock Biosecurity and Why It Matters in Maine

Livestock biosecurity is the set of management practices designed to prevent disease-causing pathogens from entering, spreading within, or leaving your farm. It covers everything from how you handle new animals and visitors to how you clean equipment, manage wildlife, and dispose of carcasses.

The cornerstone of maintaining a healthy herd is avoiding the introduction of disease. Employing sound biosecurity principles will prevent exposure of healthy animals to new pathogens, thereby avoiding losses in the form of animals, products, time, and money spent responding to disease. For Maine producers, that financial reality is compounded by the state’s geographic position in the Atlantic Flyway — a major migratory bird corridor that increases exposure risk to diseases like HPAI.

In February 2025, Maine health officials urged precautions for the public as Avian Influenza was confirmed in Maine, and in September 2024 an Eastern Equine Encephalitis case was identified in a Maine horse, with a separate health advisory issued for increased illness and death in Maine pigs. These incidents underscore why a proactive biosecurity posture is essential rather than reactive.

Biosecurity is the first defense against disease and many others. Maine’s DACF Animal Health program provides regulatory oversight, disease surveillance, and compliance support to producers across the state. Staying current with their guidance — and with the statutes and rules that govern your operation — is your first line of protection.

Premises Registration and Identification Requirements in Maine

Before you can fully participate in Maine’s animal disease traceability system, you need a Premises Identification Number (PIN). Premises Identification is one part of the USDA Animal Disease Traceability (ADT) program. A Premises Identification Number (PIN), also commonly called a “Prem ID,” is a unique code that is permanently assigned to a single physical location.

A premises is any physical location where livestock animals are managed or held, which includes all locations where livestock is born, raised, marketed, or exhibited. Examples may include farms and hobby farms, veterinary clinics, stables, livestock markets, and livestock exhibitions. If you operate at more than one site, each location requires its own separate PIN.

The PIN record helps animal health officials quickly and precisely identify the locations of livestock and their potential contacts during an animal disease outbreak. This is not a bureaucratic formality — it is the mechanism that allows the state to contain a disease event before it spreads to neighboring farms.

To register, you will need to provide the following information to the Maine DACF Animal Health Program:

• Name and contact information of the location owner
• Physical location of the premises
• Livestock species housed at that location
• Name and contact information of the animal owner or primary caretaker

You do not need to provide the number of animals or other information associated with the location. You can register online, and the DACF office will process your information and either email or call with your premises identification number usually within one business day.

Livestock production is vitally important to the economy of Maine, and registering your premises provides the state with the means to respond quickly and effectively to limit the spread of disease and minimize losses. In addition, the ability to trace and control the spread of animal diseases helps to ensure consumer confidence in a safe food supply.

Beyond premises registration, Maine participates in the federal USDA Animal Disease Traceability program, which sets standards for individual animal identification and recordkeeping for livestock moving interstate. The ADT program is a USDA initiative that applies to all livestock moving interstate. This system incorporates individual animal identification, recordkeeping, and when necessary, record sharing. Although animal disease traceability does not prevent disease, an efficient and accurate traceability system reduces the number of animals and response time involved in a disease investigation.

Maine also has specific rules for licensed livestock dealers, scrapie intrastate movement of sheep and goats, and farmed cervid licensing. These are codified under Chapter 201 (Rules Governing Licensed Livestock Dealers), Chapter 202 (Scrapie Intrastate Movement of Sheep and Goats), Chapter 203 (Rules for Participation in the Maine Chronic CWD Monitoring and Surveillance Program), and Chapter 204 (Rules for Licensing Requirements for Farmed Cervid). Review the relevant chapter for your species to confirm your specific identification and licensing obligations. You can also review livestock disease reporting requirements in Florida and livestock disease reporting in Colorado for a comparative look at how other states structure their traceability frameworks.

Biosecurity Plan Requirements in Maine

Maine’s DACF Animal Health Program actively supports producers in developing written biosecurity plans through a structured assistance program. The Animal Health Program offers biosecurity plan enrollment to producers who select one qualifying training to participate. Completing this pathway also makes you eligible for disease testing and biosecurity supplies.

While a written biosecurity plan is not universally mandated by statute for every operation, it is strongly encouraged — and for poultry producers, it is treated as a best management practice standard. Having a written biosecurity plan for your poultry operation that addresses visitors, then following it, is a recognized best management practice in Maine.

The Maine DACF provides a Biosecurity Plan Template for Livestock and Poultry that outlines the key components your plan should address. At minimum, a well-structured plan for Maine operations should cover:

1. Farm access control — who is permitted on the premises and under what conditions
2. Visitor and vehicle protocols — sign-in logs, sanitation stations, and restricted zones
3. Animal introduction procedures — isolation periods, testing requirements, and sourcing standards
4. Cleaning and disinfection schedules — for housing, equipment, and transport vehicles
5. Wildlife and pest exclusion measures — fencing, feed storage, and deterrents
6. Sick animal identification and response protocols — how you detect, isolate, and report illness
7. Mortality management procedures — compliant disposal methods under Maine Chapter 211

The DACF Animal Health program provides a Livestock General Best Management Practice Guide and makes recommendations for animal and herd health in support of public health. Consulting this guide when drafting or updating your biosecurity plan will help ensure your document reflects current state standards. For additional context on how disease reporting intersects with biosecurity planning, see livestock disease reporting in California and livestock disease reporting in Illinois.

Animal Isolation and Movement Control Requirements in Maine

Controlling how and when animals enter your herd is one of the most effective biosecurity measures available to you. Maine’s rules on animal movement apply at both the import and intrastate levels, and failure to comply can result in quarantine, forced testing, or denial of entry.

Import requirements: An import permit is required for livestock entering Maine. This applies to all covered species. Pet pigs are still considered livestock and must meet all import requirements for swine. Pet microchips are NOT acceptable forms of ID. You must use official identification as defined under Maine’s animal identification rules.

Intrastate movement: Maine’s Chapter 206 governs the Prevention, Control, and Eradication of Disease of Domestic Animals and Poultry, while Chapter 202 covers scrapie intrastate movement of sheep and goats. These chapters set the specific testing and documentation requirements that apply when you move animals between premises within the state.

Exhibition and fair movement: Lactating animals moving interstate to an exhibition or show must have a negative test result from samples collected within seven days of movement. The DACF Animal Health team provides regulatory oversight at Maine agricultural fairs and can answer species-specific movement questions during fair season.

Once new animals arrive at your farm, a minimum 30-day isolation period is the standard recommended practice before introducing them to your existing herd or flock. During isolation, you should:

• House new animals in a separate building or paddock with no shared airspace where possible
• Use dedicated tools, feeders, and waterers for the isolated group
• Observe animals daily for signs of illness including respiratory distress, diarrhea, lameness, or neurological symptoms
• Work with an accredited veterinarian to conduct any required disease testing before integration
• Document arrival dates, source premises PIN, and any health observations in your farm records

For producers who also transport animals, understanding trailer-specific requirements in neighboring states can be valuable. See livestock trailer requirements in Pennsylvania and livestock trailer requirements in Wisconsin for reference when moving animals across state lines.

Visitor, Vehicle, and Equipment Sanitation Rules in Maine

Every person, vehicle, and piece of equipment that enters your farm is a potential disease vector. Maine’s best management practices and biosecurity plan framework place significant emphasis on controlling these entry points, particularly given the ongoing HPAI risk in the region.

Maine poultry producers are encouraged to implement wild bird exclusion and farm sanitation practices for their farms. The same sanitation logic extends to all livestock operations — any surface that has been on another farm, at a livestock market, or in contact with unknown animals should be treated as potentially contaminated before entering your premises.

The following sanitation standards reflect Maine DACF guidance and recognized best management practices for visitor, vehicle, and equipment control:

Your biosecurity plan should designate a clear boundary between “clean” and “dirty” zones on your property. Visitors should never proceed directly from a vehicle to animal housing without passing through a sanitation point. Signage at your farm entrance communicating biosecurity expectations is a simple, low-cost measure that signals compliance and deters casual unannounced entry.

The Agricultural Compliance Program (ACP) of the Maine DACF was developed to investigate and resolve complaints from the public concerning farms, farm operations, or agricultural composters that involve threats to human or animal health and safety, and to the environment. Maintaining documented sanitation protocols is one of the strongest protections you have if a complaint is filed against your operation.

Wildlife and Pest Control Obligations in Maine

Maine’s forests, wetlands, and abundant wildlife populations create a persistent biosecurity challenge for livestock producers. Wild birds, rodents, deer, raccoons, and other animals can introduce pathogens directly into your feed, water, and housing areas without any human involvement.

Maine poultry producers are encouraged to implement wild bird exclusion and farm sanitation practices for their farms. This guidance has taken on added urgency given confirmed HPAI detections in Maine and the ongoing presence of the virus in wild bird populations along the Atlantic Flyway. The Maine DACF Animal Health program and Inland Fisheries and Wildlife are regularly surveilling poultry and wild birds.

Wild bird exclusion is particularly critical for poultry operations but applies broadly to all livestock facilities. Effective wildlife and pest control measures include:

• Covering feed storage areas to prevent wild bird and rodent access
• Storing feed in sealed, hard-sided containers rather than open bags
• Repairing gaps, holes, and broken screens in barns and housing structures
• Installing bird netting over open poultry runs and outdoor access areas
• Eliminating standing water near animal housing to reduce mosquito breeding (relevant for Eastern Equine Encephalitis and West Nile Virus risk)
• Implementing an active rodent control program using traps or licensed pest management professionals
• Maintaining clear perimeters around buildings by removing brush, debris piles, and tall grass that provide rodent harborage

Complaints investigated by the Agricultural Compliance Program include, but are not limited to, flies and insects, improper carcass disposal, manure handling, odors, and water quality. Fly and insect control is therefore both a biosecurity obligation and a compliance matter under Maine’s Agricultural Compliance Program regulations.

For producers who use livestock guardian animals as part of their wildlife deterrence strategy, understanding their role in a broader biosecurity plan is important. See facts about livestock guardian dogs for more on how these animals can complement physical exclusion measures.

If you use pesticides for pest control on your farm, note that Maine classifies all pesticides into three categories: general use, restricted use, and limited use — with restricted and limited use pesticides requiring a license for application. All pest control companies are required to be licensed by the Maine Board of Pesticides Control, and a certified and licensed applicator must be on site whenever pesticides are applied for hire or in public places.

Dead Animal Disposal Requirements in Maine

Proper carcass disposal is one of the most regulated aspects of livestock biosecurity in Maine. Leaving a dead animal improperly is both a disease risk and a legal violation. Maine’s rules on this subject are detailed, species-specific, and enforced.

Chapter 211 covers rules and regulations relating to disease control of domestic animals and poultry. The thrust of these rules is on the control of disease, but they also include requirements designed to ensure environmental protection, avoidance of a public nuisance, minimizing odors, and controlling flies.

Chapter 211 applies to the disposal of all domestic animal carcasses, but there is an exemption for non-commercial pet owners who wish to dispose of their own small pets on their own land. The disposal of larger pets such as horses is not exempt from Chapter 211. This means that all livestock carcasses — regardless of the size of your operation — fall under these rules.

Maine’s approved disposal methods under Chapter 211 include:

1. Burial — requires a site and soils evaluation; setback requirements from water sources, property lines, and wells apply
2. Composting — an accepted method for routine mortalities including poultry; requires proper carbon-to-nitrogen ratios and monitoring
3. Incineration — permitted using approved equipment; trench-type air curtain burners require both site and soils evaluation
4. Rendering — using a licensed rendering facility; carcasses must be stored appropriately until pickup
5. Licensed landfill — where accepted by the facility and compliant with applicable waste rules

All methods of disposal require a site evaluation covering setbacks, availability of power, and access. Some methods also require a soils evaluation. Do not select a disposal method without first confirming that your site meets the applicable evaluation criteria.

Animals that die or are euthanized as a result of a suspected neurological disease such as rabies or Transmissible Spongiform Encephalopathy (TSE) shall be reported to the state veterinarian prior to disposal. The state veterinarian will prescribe the appropriate storage and disposal requirements for animals displaying signs of a neurological disease on a case-by-case basis.

For poultry specifically, disposal of a small flock of fewer than 500 birds may be done by following the procedures outlined in the University of Maine publication “Safe Disposal of Backyard Poultry Mortalities.” The responsible party having a flock suspected to have a highly contagious disease such as HP Avian Influenza shall report the disposal to the Commissioner.

Maine law also addresses abandonment of carcasses as a nuisance. Whoever leaves or deposits the carcass of a dead horse, cow, sheep, hog, or of any domestic animal or domestic fowl in any place where it may cause a nuisance shall, upon receiving notice from the local health officer, promptly remove, bury, or otherwise dispose of such carcass. If the person fails to do so within the time prescribed by the local health officer, the person must be punished by a fine of not less than $10 nor more than $100 or by imprisonment for not more than 3 months.

For questions about carcass disposal methods or to request a site evaluation, see the Chapter 211 Rules for the Disposal of Animal Carcasses, or contact the Nutrient Management Program Manager at (207) 287-7608.

Understanding how Maine’s requirements compare to those in other states can help multi-state producers stay compliant across jurisdictions. If your operation involves livestock movement across New England or beyond, also review livestock trailer requirements in Nevada and brand inspection requirements in Washington for additional compliance context. Maine residents who also hold fishing licenses in other states may find the fishing license requirements in Maine page useful for managing all their regulatory obligations in one place.

Staying ahead of Maine’s livestock biosecurity requirements means keeping your premises registered, your biosecurity plan current, your animals properly isolated on arrival, your sanitation protocols documented, your wildlife exclusion measures active, and your carcass disposal method pre-approved. Each of these obligations connects to the others — and together, they form the foundation of a compliant, disease-resilient operation. Contact the Maine DACF Animal Health Program at (207) 287-3701 or animalhealth.AGR@maine.gov whenever you have questions about your specific obligations.