Puppy Mill Laws in Maine: What the State’s Breeder and Pet Store Rules Actually Say

Maine has built one of the stronger animal welfare frameworks in the United States, consistently earning high marks from national advocacy organizations for its protections. If you are trying to understand how the state defines, regulates, and penalizes large-scale commercial dog breeding, you are in the right place.

This guide walks you through every layer of Maine’s puppy mill-related laws — from how the state defines a breeding kennel to what happens when someone violates the rules. Whether you are a prospective dog buyer, a concerned neighbor, or a small breeder trying to stay compliant, the information below gives you a clear picture of where Maine stands.

What Is Considered a Puppy Mill in Maine

Maine does not use the phrase “puppy mill” in its statutes. Instead, the law works through defined categories that capture the same operations advocates typically call puppy mills. The key term is “breeding kennel,” and understanding that definition tells you a great deal about how the state draws the line between a hobby breeder and a large-scale commercial operation.

Anyone who maintains at least five adult female dogs or cats capable of reproduction must obtain a breeding kennel license from the state. According to Maine Revised Statutes Title 7, Chapter 723, a breeding kennel is defined as a location where five or more breeding-age females are kept, with some or all offspring sold or transferred. Individuals who sell or exchange one litter of puppies within a 12-month period are not considered to be operating a breeding kennel under state law.

In practice, operations that welfare advocates label puppy mills — facilities that house dozens of breeding dogs in poor conditions for the sole purpose of producing puppies for sale — fall squarely within the breeding kennel definition and are subject to licensing and inspection requirements. Most puppies originating from mills have internal parasites or are sick with other communicable diseases; many have congenital defects. More often than not, the puppies born in the mills are the product of breeding adult dogs kept in cramped, filthy conditions for life — never taken out of their cages, never bathed or groomed, never feeling grass under their paws.

Key Insight: Maine’s threshold of five breeding-age females is relatively low compared to other states. This means small operations that might escape oversight elsewhere still fall under licensing requirements in Maine.

Federal Law and How It Applies in Maine

Before diving into Maine-specific rules, it helps to understand the federal layer that applies to commercial breeders everywhere in the country. Wholesale dog and cat breeding and the shipment of live animals are regulated federally by the USDA under the 1970 Animal Welfare Act. The Act requires commercial breeders to be licensed, inspected, and regulated to ensure that standards of housing, care, and medical treatment are upheld in these facilities.

You may also need a federal license if you have more than four breeding females and sell dogs sight-unseen. This USDA requirement targets breeders who sell online or through brokers without buyers ever visiting the facility — a practice common among large-scale commercial operations.

However, federal oversight has real limitations. The law is poorly enforced due to lack of funding and staffing. Inspectors find many USDA facilities are in violation of even their minimal standards. Facilities are inspected as little as once a year. If a violation is found, the USDA often grants the offenders multiple opportunities to correct the situation. Legal action is rare. When it does occur, it can take years to prosecute, and the puppy mill operator rarely loses their license.

This gap between federal law on paper and federal enforcement in practice is exactly why state-level protections matter. Maine’s own licensing and inspection system operates independently of the USDA, giving the state a separate enforcement mechanism for facilities operating within its borders. You can compare how other states handle this balance by reading about puppy mill laws in Virginia or puppy mill laws in Pennsylvania.

Does Maine Have Puppy Mill Laws

Yes — Maine has several laws that directly address the conditions and practices associated with puppy mills, even if the statutes do not use that specific term. The state’s approach combines mandatory breeder licensing, facility inspections, pet store sales restrictions, minimum age requirements for transfers, and civil penalties for violations.

The Animal Legal Defense Fund ranks Maine among the top states in the nation for strong animal protection laws. That ranking reflects a legislative history of incremental but meaningful reform, including a 2019 law that effectively ended new pet store puppy sales and a 2025 law that centralized kennel licensing authority at the state level.

Dog breeding laws in the United States vary widely by state, reflecting different approaches to regulating the industry and protecting animal welfare. Some states have stringent regulations, requiring breeders to be licensed, undergo regular inspections, and adhere to specific standards for the care and housing of animals. Maine falls into the more protective category. For a side-by-side sense of how different state frameworks compare, see the guides on puppy mill laws in Illinois and puppy mill laws in Missouri.

Important Note: Maine’s laws apply to breeders and pet stores operating within the state. Maine cannot directly regulate large-scale breeding facilities located in other states that ship puppies into Maine — which is part of why the pet store sales ban matters so much as a demand-side restriction.

Commercial Breeder Licensing and Inspection Requirements in Maine

Maine’s licensing framework for breeding kennels underwent a significant structural change in 2025. Prior to 2025, municipalities licensed kennels, but LD 1771 transferred this authority to the Department of Agriculture, Conservation and Forestry (DACF). Amended LD 1771, which requires “hobby kennels” to obtain a state license under the DACF’s authority to regulate commercial animal care facilities, became law without Governor Mills’ signature. Public Law Chapter 414 became effective September 24, 2025.

This centralization matters because it creates a single, consistent licensing standard statewide rather than a patchwork of municipal rules that varied town to town.

License Categories and Application Process

The DACF evaluates applications based on the number of breeding-age females to determine the appropriate license category — Category 1, 2, or 3. The three tiers correspond to facilities with 5–10 breeding females, 11–20, and 21 or more. Licenses expire after 12 months and must be renewed annually. Breeding kennel license fees vary by category based on the number of breeding animals maintained.

Applicants must provide documentation about their facility, the number of breeding animals, and compliance with animal welfare standards. The facility will be inspected before a license is issued to ensure compliance with commercial facility standards, including ventilation, lighting, drainage, waste disposal, fire safety equipment, isolation areas, and structural regulations.

Applications can be obtained from the Animal Welfare Program by calling (207) 287-3846 or toll-free at 1-877-269-9200.

Ongoing Record-Keeping Requirements

Animal shelters, kennels, breeding kennels, boarding kennels, and pet shops engaged in buying or selling animals must keep records of the buyer and seller in each transaction for a two-year period commencing at the time of purchase or sale. The records must be open to inspection by the department or law enforcement officers.

Maine regulations also require facilities to maintain vaccination records, medical treatment logs, and wellness exam documentation for all animals. It is unlawful for any person to sell, adopt, or give away any dog (puppy) or cat (kitten) until the eighth week of life. This minimum age rule applies to all sellers, not just licensed kennels.

The Animal Welfare Program develops and implements policies and programs to effectively address animal cruelty complaints; inspects and licenses animal shelters, pet stores, kennels, and animal research facilities; and enforces the licensing of dogs.

Pet Store Sale Restrictions in Maine

Maine’s 2019 law — Public Law Chapter 544 — is the most direct legislative response to puppy mill supply chains in the state. Maine joined a group of states that have prohibited the retail sale of puppies and kittens in pet stores, with its law enacted in 2019.

The law works by prohibiting new pet shops from obtaining licenses that authorize the sale of dogs or cats. A license issued under the pet shop licensing section does not authorize a person to keep for sale or offer for sale dogs or cats unless the pet shop meets specific requirements. A licensed pet shop that meets those requirements is a “grandfathered pet shop.”

The Grandfather Clause

In order to qualify for the exception, a pet shop must provide documentation of the ownership of the pet shop on May 1, 2019, as well as the number of animals offered for sale in 2018 and annually thereafter. “Remains in the same ownership” means a static state of ownership in which no ownership interest changes after May 1, 2019.

The law grandfathers the three remaining pet shops that still sell dogs and cats, but if any of the three businesses are sold, the sale of animals would be prohibited. This means the pool of Maine pet stores legally permitted to sell puppies shrinks permanently every time one of those grandfathered shops closes or changes hands.

Surcharge and Disclosure Requirements for Grandfathered Shops

A person maintaining a grandfathered pet shop must collect a surcharge of $25 on each cat or dog sold that has not been neutered and forward the entire surcharge to the department for deposit in the Companion Animal Sterilization Fund.

Sellers must also provide buyers with written and oral health disclosures. All medical information required to be disclosed must be orally disclosed to the purchaser by the seller prior to purchase. Maine law further requires a signed statement from the seller disclosing any known health problems with the animal at the time of delivery.

For a look at how neighboring and comparable states handle pet store restrictions, see the articles on puppy mill laws in New York, puppy mill laws in California, and puppy mill laws in Washington.

How to Report a Suspected Puppy Mill in Maine

If you suspect a breeding operation is keeping dogs in inhumane conditions or operating without the required license, Maine gives you several reporting pathways. Acting on what you observe is important — Maine has strong animal welfare laws, but those laws only work when people report what they see.

Who to Contact First

To report a case of animal cruelty or neglect in Maine, call your local law enforcement or animal control officer first. They may be able to respond much quicker than a humane agent can.

For state-level complaints, contact the Maine Animal Welfare Program directly:

• Phone (toll-free): 1-877-269-9200
• Phone (direct): 207-287-3846
• Email: animal.welfare@maine.gov
• Hours: Monday–Friday, 7:30 AM–4:30 PM
• After-hours emergencies: Maine State Police Bangor Barracks, 207-973-3700

For after-hours cruelty emergencies, call the Maine State Police Bangor Barracks at 207-973-3700. They will contact an Animal Welfare Program representative on your behalf.

What to Include in Your Report

Complaints received via email must contain the reporting party’s name and phone number; the name of the animal owner (if known); a physical address; a description of the animals; and the type of complaint. Anonymous reports are accepted by both dispatch and the state program.

Document as much as you can before filing. Photographs, written accounts of what you observed, and dates and times all strengthen a complaint. Document the neglect and violations of existing law using pictures and written accountings. Keep a record of all communications and photos that you have with authorities concerning the animals’ welfare.

What Happens After You Report

For civil violations, an animal control officer can issue a compliance notice requiring the owner to correct the problem within a set timeframe and follow up to confirm compliance. For cases routed to the Maine Animal Welfare Program, a humane agent will be assigned. Humane agents have full law enforcement authority, can execute search warrants, seize animals, pursue criminal charges, and manage the resulting caseload at the state level.

You can also reach out to Maine Friends of Animals, a nonprofit that operates a Cruelty Inquiry Department to help connect complainants with the right authorities and provide guidance on evidence gathering. For additional national context on reporting and enforcement, Bailing Out Benji maintains state-by-state maps of commercial breeder and pet store laws.

Penalties for Puppy Mill Violations in Maine

Maine enforces its breeding and pet store laws through a combination of civil fines, license actions, and — for the most serious conduct — criminal charges. The specific penalty depends on the nature and severity of the violation.

Civil Penalties

Most licensing and care standard violations are treated as civil matters. Maine regulations establish civil penalties for pet stores, kennels, or animal shelters that violate either the animal welfare regulations or Chapter 719 of Title 7 of the Maine Revised Statutes.

For pet store violations specifically, a fine of up to $500 may be adjudged and the person is subject to the suspension or revocation of the pet shop license. Each offer for sale of an animal in violation of the restrictions is treated as a separate violation. Selling a puppy before it reaches eight weeks of age carries a fine of not less than $50 and not more than $200 per animal under Maine Revised Statutes Title 7, §3938-A.

License Suspension and Revocation

The department may, in accordance with Title 5, revoke or suspend the license of a pet shop or breeding kennel that violates any provision of the animal welfare chapter or rules adopted under it. License revocation is a significant consequence for a commercial operation, since it effectively shuts down the ability to sell animals legally.

The department is directed to issue a written notice when a licensed facility fails inspection. The notice must describe the violation and corrective action needed. The department is directed to charge a fee when more than two inspections are required to ensure that the corrective actions have been taken. This repeat-inspection fee creates a financial disincentive for operators who repeatedly fall short of standards.

Criminal Enforcement

More serious conduct, including intentional cruelty, falls under Maine Title 17 and is a criminal matter. Those cases are handled by Maine Humane Agents through the Maine Animal Welfare Program. A certified humane agent or a certified state veterinarian may seek civil penalties as provided by law as well as a permanent or temporary injunction, restraining order, or other equitable relief as the court finds appropriate.

The state takes animal welfare violations seriously, and chronic violators may face increased scrutiny from regulatory agencies. Maine law enforcement and the Animal Welfare Program coordinate to address facilities that fail to comply with licensing and welfare requirements.

Pro Tip: If you are buying a puppy in Maine and the seller cannot produce a valid breeding kennel license number, that is a red flag worth investigating before any money changes hands. Licensed sellers are required to display their license number in advertising.

Maine’s layered approach — licensing thresholds, pre-issuance inspections, a pet store sales ban, and meaningful penalties — reflects a state that has put real legislative effort into addressing the conditions that define puppy mills. If you want to see how Maine compares to other states with active regulatory frameworks, the guides on puppy mill laws in Colorado, puppy mill laws in Minnesota, and puppy mill laws in New Jersey offer useful points of comparison. For states where enforcement remains more limited, see puppy mill laws in Georgia and puppy mill laws in Tennessee.