Connecticut dog laws: leash, licensing, bites and breed rules

Connecticut is one of the few states that run dog licensing statewide through the town clerk, and it combines that with strict owner liability and a ban on breed-specific town rules. This summary is general information about state law and is not legal advice. Reviewed November 2026.

Leashes and licensing

The state does not have a general leash law, but it does bar an owner from letting a dog roam at large on another person's land, or on any part of a public highway, when the dog is not under the owner's or an agent's control. An unauthorized dog on someone else's land or on a highway is prima facie evidence of a violation, and the offense is an infraction.

Every dog six months or older must be licensed in the town clerk's office in the town where it is kept, by June 30 each year. The fee is lower for neutered or spayed dogs. The owner must show a rabies certificate, and the licence comes with a tag.

Rabies vaccination

An owner or keeper of a dog or cat must have it vaccinated against rabies at 12 to 14 weeks of age, or at the age the manufacturer recommends, with a booster a year later and then at least every three years. A violation is an infraction.

When a dog bites or attacks a person or another animal, an animal control officer must quarantine it for ten days. On the tenth day the State Veterinarian or a designee examines it to decide whether the quarantine continues. A vaccinated dog may be quarantined at the owner's home if the premises are adequate, and the owner pays the costs.

Dangerous dogs and bites

Connecticut's civil rule is strict liability. If a dog does any damage to the body or property of a person, the owner, the keeper, or both are liable for the amount, unless the person was trespassing, committing another tort, or teasing, tormenting or abusing the dog. If the owner is a minor, the parent or guardian is liable. For disposal, the statute lets a municipal animal control officer who finds that a person was bitten or attacked make any order about restraint or disposal of the dog needed to protect public safety, after weighing the owner's ability to control it, the severity of the injury, how vicious the attack was and any history of past bites.

Breed-specific rules

Towns may regulate and prohibit dogs going at large, but state law says no municipality shall adopt a breed-specific dog ordinance.

Tethering and hot cars

State law prohibits tethering a dog to a stationary object or a trolley or pulley by means of a tether that does not allow at least eight feet of movement, a tether with no swivels on both ends (unless a person is present), a choke, prong or similar collar, weights or heavy chain links, or a tether long enough to reach a hazard such as a road. When a weather advisory has been issued, or conditions pose a risk, tethering outdoors is limited to 15 minutes. Fines are $100 for a first offense, $200 for a second and $250 to $500 after that. A person who forces entry into someone else's car to remove a child or animal in imminent danger of serious injury has an affirmative defense if they used only the force needed, report the entry to law enforcement within a reasonable time and look after the animal.

Where to check your local rule

Towns and cities often have stricter leash, number-of-dogs and other rules than the state. Check your town animal control website or ordinance code. If your dog has bitten someone or has been reported, talk to a lawyer or the animal-control office.