Massachusetts is one of the strongest states in the country for a person bitten by someone else’s dog. You do not have to prove the owner was careless, and you do not have to prove the dog had ever bitten anyone before. The statute puts liability on the owner or keeper from the first bite. What decides most cases is not fault but two narrow defenses, the identity of the “keeper,” and whether the injured person was a child under seven.
Scalli Murphy Law handles dog bite and animal attack claims across Greater Boston and the North Shore. If you or your child was bitten, the sections below explain exactly how these claims work in Massachusetts.
Is Massachusetts a strict liability dog bite state?
Yes. Massachusetts imposes strict liability by statute. Under G.L. c. 140, § 155:
“If any dog shall do any damage to either the body or property of any person, the owner or keeper, or if the owner or keeper be a minor, the parent or guardian of such minor, shall be liable for such damage, unless such damage shall have been occasioned to the body or property of a person who, at the time such damage was sustained, was committing a trespass or other tort, or was teasing, tormenting or abusing such dog.”
Three things follow from that language, and they matter enormously in practice.
First, there is no “one free bite” rule in Massachusetts. Some states require proof that the owner knew the dog was dangerous. Massachusetts does not. The dog’s history is irrelevant to liability.
Second, you do not need to prove negligence. Whether the owner latched the gate, leashed the dog, or did everything a careful person would do makes no difference to liability under the statute.
Third, the statute is not limited to bites. It reaches “any damage to either the body or property of any person.” A dog that knocks an elderly person down on a sidewalk, or lunges and causes someone to fall off a bicycle, can create liability even though no teeth ever touched skin. This is one of the most commonly missed claims in Massachusetts.
Who is liable, the owner or the keeper?
The statute reaches “the owner or keeper,” and those are two different people. A claim does not fail simply because the person who was handling the dog does not hold title to it.
Massachusetts courts describe keepership as harboring a dog together with an assumption of custody, management and control over it. In plain terms, someone who takes the dog in and runs its daily life can be a keeper even if they never bought it. That can include a dog sitter, a boarding kennel, a groomer, a relative caring for the dog while the owner travels, or a partner living in the same household who feeds and walks it.
Landlords are a frequent question and the answer is usually no. Merely owning the building where a tenant’s dog lives does not make a landlord a keeper, and Massachusetts courts have rejected the argument that something like a “beware of dog” sign posted by a property owner amounts to an assumption of custody and control. A landlord can still face a claim on other grounds in the right circumstances, but not automatically under the dog bite statute.
The statute also reaches a parent or guardian where the owner or keeper is a minor. If a teenager owns the dog, the claim runs against the parent.
Identifying every possible owner and keeper early matters, because each one may bring a separate insurance policy to the table.
What defenses can the dog owner raise?
The statute itself supplies the defenses, and there are only two categories. Liability does not attach where the injured person, at the time of the injury, was:
- committing a trespass or other tort, or
- teasing, tormenting or abusing the dog.
That is the whole list. Insurers routinely raise both, and they are often raised loosely. A delivery driver, a postal carrier, a guest, a child visiting a friend, a person walking on a public sidewalk, and a contractor invited onto the property are not trespassers. Ordinary contact with a dog, including petting it with permission, is not teasing or tormenting it.
How the burden of proof is allocated on these points can itself be contested where the injured person is an adult, which is precisely why the statute’s presumption for young children matters so much. Either way, careful early work tends to close these arguments off before they gain traction: witness statements, photographs of where the attack happened, and the animal control report.
What if a child was bitten?
Children are bitten more often than adults, they are bitten higher on the body, and Massachusetts law gives them a significant additional protection.
Under the second sentence of § 155, if the injured child is under seven years old, it is presumed that the child was not trespassing and was not teasing, tormenting or abusing the dog, and the burden of proof on those points falls on the defendant. In practice this removes the insurer’s two available defenses unless it can affirmatively prove one of them about a small child. It is the single most valuable provision in the statute and it is frequently overlooked.
Three other things change when the injured person is a minor:
- Scarring is valued differently. A facial scar on a young child may require revision surgery years later, once growth is complete. A claim settled before a plastic surgeon has given an opinion on future revision can badly undervalue the injury.
- A settlement for a minor requires court approval in Massachusetts. This is a formal step, not a formality, and it should be planned for rather than discovered at the end.
- The deadline is different. See the section on time limits below.
Does homeowners or renters insurance cover a dog bite in Massachusetts?
Usually, yes. Most dog bite claims in Massachusetts are paid under the personal liability coverage of the dog owner’s homeowners or renters policy, and that coverage generally follows the dog rather than the address, so it can apply to a bite that happens in a park or on a walk.
Several coverage issues come up often enough to check at the outset:
- Breed exclusions. Some carriers exclude specific breeds outright or refuse to write coverage where a particular breed lives in the home.
- Animal liability exclusions. Some policies exclude dog-related liability entirely, and some exclude any dog with a prior bite history.
- Policy limits. A serious mauling with reconstructive surgery can exhaust a modest liability limit.
- Umbrella coverage. Where limits are inadequate, an umbrella or excess policy may sit above the homeowners policy.
- Renters and tenants. A tenant’s renters policy frequently provides the liability coverage even where the landlord has none.
Where there is no insurance at all, the claim runs against the owner or keeper personally, and identifying every keeper becomes more important rather than less.
What are the most common dog bite injuries?
Puncture wounds
A dog’s canine teeth drive bacteria deep beneath the skin through an opening that looks minor at the surface. Puncture wounds carry the highest infection risk of any bite injury and are routinely underestimated in an emergency room triage note.
Lacerations and avulsion injuries
When a dog bites and pulls, tissue tears rather than cuts. Avulsion injuries, where tissue is torn away, often need surgical repair and leave the most significant scarring.
Facial injuries and permanent scarring
Bites to the face, lips, nose and ears are especially common in children because of their height relative to the dog. These injuries carry both a disfigurement component and, frequently, a need for future revision surgery.
Nerve damage
Deep bites to the hands, arms and face can sever or compress nerves, producing lasting numbness, weakness or loss of fine motor control. Hand injuries in particular can affect the ability to work.
Infection, including cellulitis and sepsis
Dog bites introduce oral bacteria directly into tissue. Infection can develop within a day or two, and a wound that appeared minor at first can escalate quickly.
Rabies exposure and post-exposure treatment
Where the dog’s vaccination status cannot be confirmed, the injured person may need a course of post-exposure prophylaxis. This is both medically significant and a real element of a claim.
Fractures and knockdown injuries
Large dogs cause serious injuries without biting at all. Knockdowns produce wrist fractures, hip fractures in older adults, and head injuries, all of which fall within the statute’s reference to “any damage” to the body.
Psychological injury
Fear of dogs, nightmares, avoidance of parks and sidewalks, and diagnosed post-traumatic stress are common after an attack, particularly in children. These are compensable and should be documented by a treating provider rather than described for the first time in a demand letter.
What if the dog had already been declared dangerous?
This is where Massachusetts law becomes considerably harsher on the owner, and it is worth investigating in every case.
Under G.L. c. 140, § 157, a municipal hearing authority can investigate a complaint about a dog and issue orders, including that the dog be restrained, muzzled, confined or, in the most serious cases, euthanized. An owner who violates such an order can have the dog seized and can be barred from licensing a dog anywhere in Massachusetts for five years.
The consequence for a civil claim appears in G.L. c. 140, § 159: where a hearing authority or a district court has already deemed a dog to be a dangerous dog and that dog then wounds a person, the owner or keeper is liable in tort for three times the damages sustained.
Treble damages change the value of a case completely. Finding out whether a prior complaint or hearing exists means checking with the local animal control officer and the town clerk, and it is not something an insurer will volunteer.
What should you do after a dog bite in Massachusetts?
- Get medical care promptly, and say plainly that the injury was a dog bite so it is recorded that way.
- Identify the dog and its owner or keeper, including anyone who was caring for the dog at the time.
- Report the bite to the local animal control officer. This creates an official record, starts the quarantine and vaccination check, and is the step that can surface a prior dangerous dog history.
- Obtain the rabies vaccination and quarantine records. These affect both treatment decisions and the claim.
- Photograph everything early, including the wounds before they close, the location, and any fence, gate, leash or enclosure involved.
- Keep the treatment consistent, and follow through on referrals for infection, nerve symptoms or scar assessment.
- Do not give a recorded statement to the dog owner’s insurer before you understand the claim.
What compensation can you recover for a dog bite?
A Massachusetts dog bite claim can include medical expenses already incurred and reasonably expected in the future, including revision surgery for scarring; lost wages and reduced earning capacity where a hand or facial injury affects work; the pain and suffering caused by the attack and the treatment; permanent scarring and disfigurement as a distinct element; and the psychological effects of the attack. Where the dog had already been deemed dangerous, § 159 trebles the damages sustained.
How long do you have to file a dog bite claim in Massachusetts?
Under G.L. c. 260, § 2A, actions of tort must generally be commenced within three years after the cause of action accrues.
For children the clock is different. Under G.L. c. 260, § 7, where the person entitled to bring the action is a minor, the action may be commenced within the ordinary period after the disability is removed. In practice that means a child generally has until three years after turning eighteen. That is a long time, but waiting is rarely an advantage: witnesses move, animal control records are purged, and the dog’s history becomes harder to reconstruct.
Claims involving a municipality or a public entity can carry much shorter notice requirements, so those should be reviewed immediately.
Frequently Asked Questions
Do I have to prove the dog bit someone before?
No. Massachusetts has no “one free bite” rule. Under G.L. c. 140, § 155 the owner or keeper is liable from the first bite, and the dog’s history is not part of your case in chief. A prior dangerous dog finding matters only because it can treble your damages under § 159.
The dog’s owner is my friend or a family member. Am I suing them personally?
In nearly every case the claim is paid by a homeowners or renters liability insurer, which is exactly what that coverage exists for. The insurer, not your friend, evaluates and pays the claim. This is the most common reason people delay calling a lawyer, and it is usually based on a misunderstanding of how the coverage works.
My child was bitten but the owner says my child provoked the dog. Does that end the claim?
Not by itself, and if your child was under seven years old the law places the burden on the dog’s side. Section 155 presumes a child under seven was not trespassing and was not teasing, tormenting or abusing the dog, and the defendant must prove otherwise.
The dog knocked me down but never bit me. Do I still have a claim?
Possibly. The statute covers “any damage to either the body or property of any person,” which is broader than a bite. Knockdown injuries, including fractures from a large dog jumping or lunging, can fall within it.
What if the bite happened at a dog park or on a walk?
Location does not change the analysis. The liability follows the owner or keeper, and homeowners liability coverage generally follows the dog rather than the property.
How much does it cost to hire a dog bite lawyer?
We handle dog bite claims on a contingency fee, which means no fee unless we recover for you. The initial consultation is free.
Do you have a Massachusetts dog bite lawyer near me?
Scalli Murphy Law is at 537 Broadway, Everett, MA 02149, just off Route 16 and Broadway in Everett Square, with parking on site and the MBTA 104, 109 and 110 bus routes stopping within a short walk. We serve Everett, Chelsea, Malden, Medford, Revere, Somerville, Lynn and the surrounding Greater Boston communities, and we travel to clients who cannot travel to us, including at home or in hospital.
Call (617) 387-7000 to speak with our office.