A dog bite can leave you facing medical treatment, missed work, and uncertainty about who should pay for your injuries. In New York, a dog owner may be liable if they knew or should have known about the dog’s dangerous tendencies, or if their failure to use reasonable care caused the attack. A previous bite is not always necessary to pursue compensation.

An April 2025 court decision expanded the legal options available to injured people by allowing ordinary-negligence claims against dog owners. Understanding these rules can help you identify the evidence that may support a dog bite injury claim.

Key Takeaways: When Is a Dog Owner Liable for a Bite in New York?

• Dog owners may face liability based on known dangerous tendencies, ordinary negligence, or both.
• A previous bite is not required, although prior threatening behavior may help establish an owner’s knowledge.
• A leash-law violation or unsecured gate may support a negligence claim if it contributed to the injury.
• The injured person’s conduct and the circumstances of the attack can affect liability and compensation.
• Most New York dog bite personal injury lawsuits have a three-year filing deadline, but exceptions and shorter deadlines may apply.

When Is a Dog Owner Liable for a Bite in New York?

New York recognizes two common-law paths to holding a dog owner responsible for an injury: strict liability and ordinary negligence. An injured person may pursue either theory or both when the evidence supports them.

Under strict liability, the injured person must establish that the dog had dangerous tendencies, the owner knew or should have known about them, and those tendencies caused the injury. This route does not require proving that the owner handled the dog carelessly during the particular incident.

Under ordinary negligence, the injured person must establish that the owner owed a duty of reasonable care, failed to meet that duty, and caused the injury through that failure. For example, leaving a gate unsecured may support a claim if doing so allowed the dog to escape and attack someone.

The New York Court of Appeals confirmed this two-part framework in Flanders v. Goodfellow, decided April 17, 2025. The court overruled the restriction established in Bard v. Jahnke that generally barred ordinary-negligence claims against owners for harm caused by their animals.

This 2025 change to New York dog bite law means an owner’s lack of knowledge about prior dangerous behavior no longer necessarily defeats a claim. The injured person may instead prove that the owner failed to take reasonable precautions against foreseeable harm.

Does the Injured Person Need to Prove the Dog Was Dangerous?

Proof of dangerous tendencies remains important for a common-law strict-liability claim, but it is not required for every negligence claim.

For strict liability, evidence may include previous bites, threatening lunges, snapping, or other behavior indicating that the dog posed a risk. A previous bite is not necessary if other evidence establishes the dangerous tendency and the owner’s actual or constructive knowledge.

However, ordinary barking, running around, or energetic behavior does not automatically establish vicious propensities. Courts examine the context and whether the behavior relates to the injury at issue. The New York Court of Appeals explained these distinctions in Collier v. Zambito.

An injured person pursuing negligence may focus on how the owner managed the dog rather than its history. Relevant questions may include:

• Did the owner allow the dog into an area where it foreseeably endangered others?
• Was a gate or enclosure left unsecured?
• Was the restraint reasonably adequate under the circumstances?
• Did the owner fail to take precautions when opening the door to a visitor?

These circumstances may support a claim, but none automatically proves liability. The evidence must connect the owner’s failure to use reasonable care to the injury.

How Do Leash Laws Affect New York Dog Bite Claims?

New York municipalities have different rules governing leashes, restraint, and access to public spaces. The applicable rule depends on where the incident occurred.

A violation of a local leash or animal-control ordinance may provide evidence of negligence. For example, allowing a dog to roam freely in a park where a leash is required may support a claim if the lack of restraint contributed to the attack.

A local ordinance violation does not automatically establish a right to compensation. The injured person must still establish the connection between the violation and the injury. Conversely, compliance with a leash rule does not necessarily resolve whether the owner used reasonable care in the circumstances.

New York’s Separate Dangerous-Dog Rule for Medical Costs

New York also has a statutory provision addressing medical costs caused by dangerous dogs.

Under Agriculture and Markets Law § 123(10), the owner or lawful custodian of a dangerous dog is strictly liable for medical costs resulting from injuries caused by the dog, subject to statutory exceptions.

This provision is separate from the common-law strict-liability and negligence claims described above. It specifically addresses medical costs, while a successful common-law claim may also allow recovery for other losses, such as lost income, pain and suffering, and lasting scarring.

The statute also establishes procedures for dangerous-dog proceedings and circumstances in which a dog’s conduct may be considered justified. These rules should not be confused with the requirements for proving a common-law personal injury claim.

How Do Location and Permission to Be on the Property Affect a Claim?

The location of the attack and the injured person’s reason for being there can affect the liability analysis.

On public property, relevant evidence may include local leash rules, the owner’s control of the dog, and the circumstances leading to the bite.

On private property, the owner may need to anticipate the presence of invited guests, delivery workers, contractors, or other foreseeable visitors. Depending on the circumstances, reasonable precautions may include separating the dog from visitors, securing an entrance, or warning about a known risk.

New York does not automatically assign different premises-liability duties based solely on whether someone was an invitee, licensee, or trespasser. Instead, courts consider reasonable care under the circumstances, including the foreseeability of the person’s presence. Entering without permission can affect a claim, but it does not automatically eliminate every duty of care.

Property ownership also should not be confused with dog ownership. If the property owner did not own or control the dog, their potential responsibility requires a separate review of their role, knowledge, and conduct. The same is true when a dog walker or another person was handling the animal.

What Defenses May a Dog Owner Raise?

A dog owner may dispute the evidence supporting liability or argue that the injured person’s conduct contributed to the attack.

For a common-law strict-liability claim, the owner may argue that the dog did not have the dangerous tendency alleged or that the owner neither knew nor should have known about it. For a negligence claim, the owner may argue that they took reasonable precautions or that their conduct did not cause the injury.

Other disputed issues may include provocation, permission to enter the property, or whether the injured person knowingly encountered a particular danger.

Under New York CPLR § 1411(a), culpable conduct by the injured person generally reduces damages in proportion to their share of responsibility in an ordinary dog bite case. For example, evidence that someone deliberately tormented the dog may affect recovery.

Knowing that a dog could bite, working with animals, or seeing a warning sign does not automatically eliminate a claim. Courts examine the specific facts and the legal theory involved.

Witness accounts, video, photographs, and other evidence can help establish what happened. If an insurer requests a recorded statement, consulting an attorney first can help you understand how the statement may affect your claim.

Evidence Used to Prove Ownership, Notice, and the Circumstances of the Bite

Useful evidence depends on the liability theory being pursued. A strict-liability claim often requires investigating the dog’s behavior before the attack, while a negligence claim may focus more closely on the owner’s precautions and conduct during the incident.

Relevant dog bite claim documentation may include:

• Photographs of injuries, damaged clothing, the location, and any gates, fences, or restraints.
• Witness accounts describing the attack or previous threatening behavior.
• Doorbell, security-camera, or other video footage.
• Police and animal-control reports, including prior complaints.
• Licensing, veterinary, or microchip records that may help identify the owner.
• Medical records, treatment expenses, and documentation of missed work.

Document injuries and the scene as soon as safely possible. Identify witnesses and request preservation of video promptly because recordings may be overwritten. Report the incident to the appropriate local authority and retain any available report information.

Continue keeping records as treatment progresses. Accurate medical documentation can help establish the nature and severity of the injuries, while expense and employment records can support the financial portion of the claim. These are practical evidence-preservation steps, rather than fixed legal deadlines.

Frequently Asked Questions About New York Dog Bite Liability Claims

Can a Dog Owner Be Liable if the Dog Never Bit Anyone Before?

A first bite can still lead to liability. A common-law strict-liability claim may be supported by other dangerous behavior that the owner knew or should have known about. Alternatively, an injured person may pursue negligence by showing that the owner failed to use reasonable care and that the failure caused the injury.

What if the Injured Person Was Working on the Property?

A delivery driver, contractor, utility worker, or other person bitten while working may have a claim against a responsible dog owner. If the injury arose out of and in the course of covered employment, workers’ compensation benefits may also be available.

A third-party personal injury claim may coexist with workers’ compensation when the responsible person is someone other than the worker’s employer or coworker. Employment relationships and workers’ compensation rules can affect whom the injured worker may sue.

How Long Do You Have to File a Dog Bite Lawsuit in New York?

Under New York CPLR § 214(5), most dog bite personal injury lawsuits must be filed within three years of the injury. Statutory tolling rules, including those that may apply to injured children, can affect the deadline.

Claims against certain government entities have different requirements. Covered municipal claims generally require a notice of claim within 90 days and a lawsuit within one year and 90 days, subject to applicable exceptions. The correct deadline depends on the defendant and the circumstances, so it is important to review it promptly.

Need Legal Help? Brandon J. Broderick, Attorney at Law, Is Here for You

At Brandon J. Broderick, Attorney at Law, we believe everyone deserves top-tier legal representation, regardless of their financial situation or the complexity of their case. You do not have to navigate this difficult time alone. We are committed to supporting you through every phase of the legal process, providing compassionate guidance when you need it most.

Our dedicated team is available 24/7 to listen to your story, review the circumstances of your case, and pursue the full compensation available under the law. Take the next step toward protecting your health, finances, and legal rights. Contact us today for a free, no-obligation legal consultation.