New Hampshire Dangerous Dog Law

What happens right after the bite?

The first step is rabies control, not punishment. If your dog bites someone and breaks the skin, RSA 436:105 decides where it spends the next 10 days¹¹. A healthy dog vaccinated under RSA 436:100 is confined by you, as the local authorities direct, for 10 days and then examined by a licensed veterinarian¹¹¹⁸. If the dog is not vaccinated, or you cannot prove it is, it is seized and impounded under local supervision for at least 10 days¹¹. A dog that shows signs of rabies is euthanized and its head is sent to the state public health laboratory¹¹. You pay for the impoundment, the examination and any euthanasia¹¹. Your town's rabies control authority is the town or city manager, or the selectmen or mayor where there is no manager¹⁸.

The town will also check its records. If the bite punctured the skin and was reported to the animal officer or town clerk, that office must tell the victim within 24 hours whether your dog is vaccinated according to town records⁹. Keep your license and rabies certificate current. A veterinarian sends the clerk a copy of every rabies certificate within 40 days of the shot¹⁸.

Police dogs follow a separate rule. A vaccinated police dog that bites may stay in service, limited to law enforcement duties. Its handler observes it for 10 days and files a confidential incident report¹².

Is my dog now "vicious"?

New Hampshire does not use the terms "dangerous dog" or "potentially dangerous dog". RSA 466:31 sorts problem dogs into three groups⁹:

• Nuisance: running at large, sustained barking, digging or scattering garbage on other property, a female in heat off the premises.
• Menace: growling, snapping at, running after or chasing people who are not on your premises, or chasing vehicles and bicycles on public ways.
• Vicious: biting, attacking or preying on game animals, domestic animals, fowl or people, alone or in a pack.

There is no hearing to "declare" a dog vicious. The label follows from what the dog did. A law enforcement officer or other person the town authorizes gives you notice of the violation¹⁰. If an officer did not see the behavior, the complainant's name must be made public before any fine is levied⁹.

A change coming on January 1, 2027

A 2026 amendment narrows the vicious category. From January 1, 2027, a bite or attack counts as vicious only "when not on the owner's property"⁹. A bite inside your own yard will no longer be a vicious-dog violation under RSA 466:31, II(g). It changes nothing about civil liability: RSA 466:19 still makes you liable for the bite, wherever it happens¹.

What are the penalties?

The fines are civil forfeitures paid to the clerk of the town where the dog is kept, within 96 hours of notice¹⁰:

• First vicious offense: $400, and you are liable for all of the victim's medical bills.
• A second vicious offense within 12 months: $1,000, again with the medical bills.
• Menace offenses: $200, then $400 within 12 months.

Paying the forfeiture waives your right to a hearing in district or municipal court. If you do not pay, the case goes to court as a violation¹⁰. After two forfeitures in 12 months, later cases must go to court¹⁰. A vicious dog whose behavior threatens public safety goes straight to court, with no option to pay a fine¹⁰. The fine never limits what the victim can recover in a civil claim¹⁰.

A violation is the lowest class of offense. Chapter 466 creates no felony or misdemeanor for a dog that seriously injures or kills a person¹⁷. See criminal charges after a dog bite for how other states handle it.

Can the dog be put down?

The state statutes set no euthanasia hearing. The path runs through RSA 466:31, III. If you are ordered to abate the problem, for example by keeping the dog restrained, and you fail to, the police or a town officer take the dog into custody, and the court decides what happens to it⁹. That order can include destruction, but the statute leaves the choice to the court. A rabies suspect is a separate case: a biting dog with signs of rabies is euthanized at once¹¹.

RSA 466:28 also lets anyone kill a dog that suddenly assaults them while they are peaceably walking or riding outside the owner's enclosure, or a dog found off its owner's land worrying or killing livestock or fowl¹³.

Can my town add rules?

Yes, within limits. RSA 466:39, as amended in 2025, lets a city or town adopt bylaws on licensing, restraint and the muzzling of vicious dogs as defined in RSA 466:31, II(g), with penalties up to $50¹⁴. Towns may also adopt the state leash law in RSA 466:30-a, which makes it unlawful for a dog to run at large unless it is with its owner or working¹⁵. Ask your town clerk which of these rules apply.

The state law that lets towns muzzle dogs is tied to behavior, not breed. Chapter 466 contains no breed-specific rule¹⁷. See breed-specific legislation.

What changes if the dog bites again?

A second vicious offense within 12 months raises the forfeiture to $1,000¹⁰. A pattern of attacks also makes it more likely that a court treats the dog as a threat to public safety and orders it held or disposed of⁹¹⁰. Each bite also restarts the 10-day rabies observation¹¹. For the civil side, see my dog bit someone.

Rules for a declared dog in New Hampshire

New Hampshire rules in brief

Reporting. The statutes we read set no general duty for a doctor, owner or victim to report a dog bite to the state. Bites are handled by the town's animal control officer, police or town clerk. If a bite that broke the skin is reported to the animal officer or town clerk, that office must tell the victim (or a child's parent) within 24 hours whether town records show the dog is vaccinated against rabies⁹. The state Bureau of Infectious Disease Control takes consultations and reports of rabies exposures at (603) 271-4496¹⁶.

Euthanasia. No state hearing procedure for euthanasia exists. A dog that bites a person is "vicious" under RSA 466:31⁹. If the owner fails to abate the problem or obey an order, police or the town take the dog into custody and "such disposition made of the dog as the court may order", which can include destruction⁹. When a vicious dog threatens public safety, district or municipal court proceedings must be started at once instead of a civil fine¹⁰.

Criminal penalties. A vicious-dog offense is a violation, not a crime: a $400 civil forfeiture the first time and $1,000 for a second within 12 months, and the owner is liable for all of the victim's medical bills¹⁰. Chapter 466 creates no felony or misdemeanor for a dog attack that seriously injures or kills a person¹⁷.

Breed rules. Chapter 466 has no breed-based rule and no express ban on local breed laws; towns may adopt muzzling bylaws only for dogs that are vicious by behavior under RSA 466:31, II(g)¹⁴¹⁷.

Compare states: dangerous dog laws by state, bite quarantine rules, euthanasia after a bite. If your dog bit someone, start with what happens next.

Sources

1. RSA 466:19, Liability of Owner or Keeper, New Hampshire General Court. Checked 17 October 2026.
2. Bohan v. Ritzo, 141 N.H. 210, 679 A.2d 597 (1996), Animal Legal & Historical Center, Michigan State University College of Law. Checked 17 October 2026.
3. RSA 508:4, Personal Actions, New Hampshire General Court. Checked 17 October 2026.
4. RSA 508:8, Disabilities, New Hampshire General Court. Checked 17 October 2026.
5. RSA 507:7-d, Comparative Fault, New Hampshire General Court. Checked 17 October 2026.
6. RSA 507:16, Punitive Damages Outlawed, New Hampshire General Court. Checked 17 October 2026.
7. RSA 507-B:7, Limitation on Actions (governmental units), New Hampshire General Court. Checked 17 October 2026.
8. RSA 507-B:4, Limit of Liability (governmental units), New Hampshire General Court. Checked 17 October 2026.
9. RSA 466:31, Dogs a Menace, a Nuisance or Vicious, New Hampshire General Court. Checked 17 October 2026.
10. RSA 466:31-a, Penalties, New Hampshire General Court. Checked 17 October 2026.
11. RSA 436:105, Impoundment of Dog Rabies Suspects, New Hampshire General Court. Checked 17 October 2026.
12. RSA 436:105-c, Police Dogs, New Hampshire General Court. Checked 17 October 2026.
13. RSA 466:28, Killing Dogs Legalized, New Hampshire General Court. Checked 17 October 2026.
14. RSA 466:39, City or Town Bylaws, New Hampshire General Court. Checked 17 October 2026.
15. RSA 466:30-a, Dog Control Law, New Hampshire General Court. Checked 17 October 2026.
16. Rabies, New Hampshire Department of Health and Human Services. Checked 17 October 2026.
17. RSA Chapter 466, Dogs and Cats (full text), New Hampshire General Court. Checked 17 October 2026.
18. RSA 436:99, 436:100 and 436:102 (rabies control definitions, vaccination, veterinarian duties), New Hampshire General Court. Checked 17 October 2026.