Michigan Dog Bite Law: Strict Liability, Provocation & the 3-Year Clock

By Attorney Manny Chahal · Updated May 2026 · Reading time: ~9 min

Michigan is one of the strongest strict-liability dog bite states in the country. Under MCL 287.351, an owner is on the hook for a bite even if the dog has never shown a hint of aggression before. The narrow path off the hook is provocation, and the deadline to sue is short. This guide explains how the statute actually works, how courts apply the provocation defense after Brans v Extrom and Koivisto v Davis, when a separate negligence claim is available under Trager v Thor, and what an injured Michigan resident should do in the first 30 days.

The Strict Liability Statute: MCL 287.351

Michigan’s dog bite statute is one sentence with a very long reach. It provides that if a dog bites a person, without provocation, while the person is on public property or lawfully on private property (including the property of the owner of the dog), the owner of the dog shall be liable for any damages suffered by the person bitten, regardless of the former viciousness of the dog or the owner’s knowledge of such viciousness.

That last clause is what makes the statute “strict.” The traditional common-law “one free bite” rule — under which a dog had to have shown viciousness before its owner was on notice — is irrelevant in Michigan. The owner is liable on the first bite, the tenth bite, and every bite in between, so long as the statutory elements are met.

What “Lawfully Present” Means

A victim qualifies as lawfully on the property if they were on public land, in a public right-of-way, or on private land with permission — express or implied. Mail carriers, package couriers, utility readers, invited guests, and people responding to an obvious invitation (a posted “Open” sign on a business; a porch light on at a residence one is invited to visit) all qualify. Trespassers do not.

A common defense argument is that the victim exceeded the scope of permission — entering a back yard when the invitation extended only to the front door. Courts examine the specific facts: fencing, warning signage, and any prior instruction to stay in a particular area.

What Counts as a “Bite”

The statute reaches only the bite itself. Other injuries from a dog attack — being knocked down, scratched, or hurt while fleeing — fall outside MCL 287.351 and must be pursued under negligence. For an incident involving both a bite and a knockdown, claimants often plead both theories in the alternative.

The Provocation Defense

Provocation is the statute’s only true defense, but it is broader than most people assume. The Michigan Court of Appeals in Brans v Extrom, 266 Mich App 216 (2005), confirmed that provocation can be either intentional or unintentional — what matters is whether the act would have caused a reasonable dog to bite.

The “Reasonable Dog” Standard

In Brans, the plaintiff stepped backward and accidentally placed her foot on an elderly Australian Shepherd’s tail. The dog yelped and bit her. The trial court instructed the jury that an unintentional act could constitute provocation, and the Court of Appeals affirmed. The decision adopted what is widely called the “reasonable dog” standard: provocation is measured from the perspective of an ordinary dog, not the specific dog at issue, and not the victim’s intent.

Practically, a victim who meant no harm — a toddler tugging an ear, a guest reaching across to greet — can still be found to have provoked if the same conduct would have caused a regular dog to react. That is why early evidence preservation matters.

Defending Yourself Is Not Provocation: Koivisto v Davis

The Court of Appeals drew an important boundary in Koivisto v Davis, 277 Mich App 492 (2008). Two dogs escaped a kennel, entered the plaintiff’s property, and attacked her cats. When she intervened to defend her pets, the dogs turned on her, inflicting 28 puncture wounds. The trial court called that provocation and dismissed her case. The Court of Appeals reversed, holding that responding in defense to an already-provoked dog is not provocation under MCL 287.351. The victim had not done anything to provoke the attack in the first place — she was reacting to one already underway.

Koivisto is essential whenever a victim intervened to protect another person or animal, or tried to fend off a charging dog.

When the Bite Doesn’t Fit: Common-Law Negligence Under Trager v Thor

If the statute does not apply — for example, the injury was not a bite, or the defendant was a temporary keeper rather than the owner — a separate common-law negligence claim is still available. The Michigan Supreme Court in Trager v Thor, 445 Mich 95 (1994), confirmed that a negligence cause of action lies against a person in temporary possession of a domestic animal where the requisite duty, breach, causation, and damages are shown.

Under Trager, prior knowledge of vicious propensities is not strictly required. If the keeper was aware of behavior suggesting a foreseeable risk of harm — lunging, snapping, prior aggression toward strangers — the keeper has a duty to reasonably guard against that danger. Failure to do so supports a negligence claim independent of MCL 287.351.

Two Claims, One Incident: How They Compare

Damages Available in a Michigan Dog Bite Case

Michigan does not cap damages in dog bite cases. A victim may recover for the full range of harm caused by the attack:

• Medical bills. Emergency department, surgical repair, plastic surgery for scarring, infection treatment, follow-up care, and any future surgery.
• Lost wages and lost earning capacity. Time missed during recovery and any long-term reduction in earning ability from permanent injury.
• Pain and suffering. Physical pain, anxiety, post-traumatic stress — particularly significant in attacks on children.
• Disfigurement. Permanent scarring carries independent weight under Michigan’s noneconomic damages framework.
• Property damage. Torn clothing, broken eyewear, and damage to anything carried at the time of the attack.

Most dog bite recoveries come from the owner’s homeowners’ or renters’ insurance policy. Some carriers exclude specific breeds or require disclosure of the dog. If coverage exists, the carrier pays; if not, the owner is personally liable, which is often a practical dead end.

The 3-Year Statute of Limitations

Both the statutory claim under MCL 287.351 and the common-law negligence claim are subject to the three-year personal injury limitations period under MCL 600.5805. The three-year clock starts on the date of the bite. Miss it, and the claim is gone in nearly every case.

Two practical exceptions exist. For minors, the limitations period is tolled until the minor turns 18, with suit required by age 19 in most cases. For incompetent adults (significant cognitive impairment), tolling continues during the period of legal incompetency. Government-owned dogs — police K-9s, for instance — trigger a separate 120-day written notice requirement and a much narrower path to recovery under the Governmental Tort Liability Act.

First 30 Days: What to Do After a Bite

1. Get medical care immediately. Dog mouths are bacterially loaded — Capnocytophaga, Pasteurella, and MRSA infections are common. An ED visit also creates an objective record of the injury within hours.
2. Report to local animal control and police. The animal control bite report is the cleanest contemporaneous evidence available. It also triggers the rabies observation period.
3. Identify the dog and the owner. Get the owner’s name, address, phone, and homeowners’ insurance carrier if possible. If the dog was on a leash held by a non-owner, record both names.
4. Photograph everything. The wound, the location, the dog, any blood on clothing, any failure of confinement (broken fence, propped gate). Photograph at the time of injury and at every stage of healing.
5. Identify witnesses. Names and phone numbers. Witnesses move and forget; recorded contact within days is worth a year of investigation later.
6. Preserve records. Keep every medical receipt, prescription, mileage log, missed-work record, and communication with the owner or carrier.
7. Do not give a recorded statement to the owner’s insurer. Recorded statements are routinely used to manufacture provocation defenses out of off-hand remarks. Speak with counsel first.

Frequently Asked Questions