New Mexico dog laws: leash, licensing, bites and breed rules

This is a general summary of New Mexico state law for dog owners. It is information, not legal advice. Reviewed November 2026.

Leashes and licensing

New Mexico has no statewide leash law. Each municipality and each county must provide by ordinance for the seizure and disposition of dogs and cats running at large and not kept on someone's premises (NMSA 77-1-12). A peace officer may impound a dog found running at large and not under its owner's control, and may kill a dog caught in the act of pursuing or wounding livestock, wounding or killing poultry or attacking people (77-1-9).

Licensing is also local. A municipality or county may by ordinance require licences for dogs over three months old, set the fee, and must see proof of rabies vaccination before issuing one (NMSA 77-1-15.1).

Rabies vaccination

Anyone who owns or keeps a dog or cat over three months old in New Mexico must have it vaccinated against rabies as state health regulations prescribe, by or under a licensed veterinarian, who issues a numbered certificate and tag (NMSA 77-1-3). A dog brought into the state must be confined until vaccinated, within one week unless the owner has a valid out-of-state certificate (77-1-5). It is unlawful to keep an animal known to be vicious and liable to attack people unless it is securely kept (77-1-10).

When a person is bitten, the person or anyone who knows where the animal is must immediately notify the animal control officer or the public health field office. A dog that bites or exposes a person to rabies must be destroyed and its head tested, or confined at the owner's expense in a place designated by the animal control officer. If it shows signs of rabies during the ten-day confinement and observation period, it is destroyed and tested (NMAC 7.4.2.9).

Dangerous dogs and bites

New Mexico has no dog-bite statute, so civil bite claims depend on common law.

The Dangerous Dog Act uses injury-based definitions. A "dangerous dog" caused serious injury to a person or domestic animal, meaning broken bones, multiple bites or disfiguring lacerations needing sutures or reconstructive surgery. A "potentially dangerous dog" may reasonably be assumed to pose a threat to public safety, shown by a lesser injury, chasing or menacing a person or domestic animal aggressively and without provocation, or acting highly aggressively in a fenced yard while appearing able to jump out (NMSA 77-1A-2). A dog is not dangerous if the victim was trespassing, provoking the dog, or committing a crime, among other exceptions (77-1A-3). The owner must register the dog, which requires a proper enclosure, a current rabies shot, neutering, a microchip and a socialization program; a dangerous dog must also stay on the owner's property, and be caged or muzzled and on a lead of no more than four feet when out (77-1A-5). Violations are misdemeanors, a second offense is a fourth-degree felony, and unprovoked serious injury to a human is a third-degree felony (77-1A-6).

Breed-specific rules

The state has no breed-specific dog rule. The Dangerous Dog Act definitions turn on a dog's behavior and the injury it caused.

Tethering and cruelty

New Mexico has no statewide law that limits tethering. The Dangerous Dog Act says a proper enclosure does not include chaining or otherwise affixing the animal to a stationary object (77-1A-2). Extreme cruelty to animals, meaning intentionally or maliciously torturing, mutilating, injuring or poisoning an animal, or maliciously killing one, is a fourth-degree felony. Negligent mistreatment and abandonment are misdemeanors until a fourth conviction (NMSA 30-18-1).

Where to check your local rule

Counties and cities often set stricter leash, licence, number-of-dogs and breed rules. Check the local animal control website or ordinance code. If a dog has bitten someone or been reported, talk to a lawyer or the animal-control office.