Massachusetts Dog Breeder Licensing Requirements

In Massachusetts, dog breeders are regulated through the kennel license system rather than a stand-alone breeder license. Under Massachusetts General Law Chapter 140, a kennel license is required for all owners of commercial boarding, training, breeding, and veterinary kennels, as well as for anyone who keeps more than four dogs aged 3 months or older (a 'personal kennel'). This means a breeder needs a kennel license from the local licensing authority (the city or town clerk, or the police commissioner in Boston) if they keep more than four dogs aged 3 months or older, even as a hobby or 'personal kennel', or if they run a commercial breeder kennel that sells to wholesalers, brokers, or pet shops. A 'personal kennel' generally may only sell dogs bred from its own personally-owned dogs and may sell to breeders or individuals by private sale, not to wholesalers, brokers, or pet shops, under the state definition in M.G.L. c. 140, section 136A. Separately, every dog over six months old must have an individual license under Chapter 140, Section 137, except dogs owned by a kennel license holder and kept at the licensed kennel; each town sets its own license period and may have additional bylaw requirements.

Kennel and individual dog licenses are issued at the local level, so you apply through your city or town clerk's office. Applications typically require proof of a current rabies vaccination for your dog or dogs, and some towns require proof of spaying or neutering where it affects the fee. For a kennel license, the kennel must pass an inspection by the local Animal Control Officer before the license is granted or renewed. State-level oversight and pet-industry questions are handled by the Massachusetts Department of Agricultural Resources, which can be reached at (617) 626-1795. Because requirements differ by municipality, breeders should contact their own town clerk and review local bylaws before applying.

Kennel and dog license fees are set by each municipality, so the exact cost varies by town. For individual dog licenses, examples from different towns include $15 for an unaltered (intact) dog and $10 for a neutered or spayed dog in Montague, and $15 for a spayed/neutered dog and $30 for an unaltered dog in Boston, with fees waived for service dogs. The licensing authority must issue a kennel license without charge to a qualifying domestic charitable corporation incorporated to protect animals from cruelty, neglect, or abuse. State law (M.G.L. c. 140, section 137A) leaves the kennel license fee, renewal fee, and license period to each city or town, and dogs under 3 months old are not counted when setting the fee.

For kennel licenses, the kennel must pass an inspection by the local Animal Control Officer before a license is issued or renewed, and every licensed kennel must be inspected at least once a year. Local bylaws may add other review steps. Inspectors check that the kennel meets local standards for animal care and conditions, and complaints can trigger follow-up inspections or nuisance orders. Ollie's Law (Chapter 213 of the Acts of 2024, in effect since December 19, 2024) updated kennel licensing and requires towns to report licensed kennels to MDAR each year. It also directs MDAR to write regulations for commercial boarding and training kennels (not breeders); the June 2026 deadline has passed, and as of October 2026 MDAR lists those regulations as still under review. If a kennel fails inspection, the license is denied until it passes; refusing an inspection is grounds for denial, suspension, or revocation, and after a nuisance petition by 25 residents and a public hearing, local officials can suspend or revoke the license or further regulate the kennel.

Massachusetts sets a few record-keeping rules for kennel license holders. A kennel must keep the name and address of the owner of each dog kept there (if not the licensee) available for inspection (M.G.L. c. 140, section 137A). A kennel licensee who sells or gives away an unlicensed dog must put a numbered tag on it, record the number, give the new owner a dated certificate describing the dog, and notify the town clerk of the buyer's name and address if the buyer does not show within two weeks that the dog was licensed (section 137B). Dogs brought into the state need an official health certificate, with a copy sent to MDAR (M.G.L. c. 129, section 39G). At the federal level, commercial breeders covered by the USDA under the Animal Welfare Act must follow federal rules for licensing, housing, veterinary care, and record-keeping, which generally applies to operations with more than four breeding females that sell puppies sight-unseen. Breeders should keep rabies vaccination certificates and any required health or sale records, and should confirm exact requirements with their town clerk and the Massachusetts Department of Agricultural Resources. Breeders should also check local bylaws, which can add requirements, and any federal rules that apply.

Keeping a kennel without the required kennel license carries a fine of $500 for a first offense and up to $1,000 for a later offense (M.G.L. c. 140, section 137A), and failing to license an individual dog carries a penalty of at least $50 (section 141). Keeping a kennel after its license is suspended or revoked brings fines of up to $250 for a first offense, at least $500 for a second, and up to $1,500 for a third or later offense (section 137C). Many towns also charge late fees if dogs are not licensed by a set deadline. Local officials can also suspend or revoke a kennel license or further regulate the kennel after a nuisance petition and hearing (M.G.L. c. 140, section 137C), and a kennel license is void, with no new license for 5 years, after a conviction under the animal cruelty laws listed in section 137D. Massachusetts also has a pet 'lemon law' requiring pet shops to give a 14-day warranty, and consumers can file complaints with the Massachusetts Department of Agricultural Resources at (617) 626-1795.