California Dangerous Dog Law
In California, a dog that bites a person is reported to the local health officer and held for 10 days of rabies observation1415. Animal control or the police can then petition for a hearing to declare the dog "potentially dangerous" or "vicious" under the Food and Agricultural Code, with strict rules, possible euthanasia and a five-day window to appeal1718.
After a bite in California
| Rabies observation | 10 daysDetails below |
|---|---|
| State dangerous-dog law | Cal. Food & Agric. Code §§ 31601–31683Potentially Dangerous and Vicious Dogs |
| Classes of dog | potentially dangerous dog, vicious dog |
| Required insurance for a declared dog | No statewide minimum |
| Breed-specific laws | Banned: state law bars breed-specific local rules |
| Civil liability for the bite | Strict liability statute |
What happens in the first 10 days
Every dog bite to a person must be reported to the local health officer, because California has declared all 58 counties rabies areas every year since 19871415. The dog is then isolated and observed for 10 days from the bite, whatever its vaccination status, in a place the health officer approves1415. Shelter or veterinary confinement is the default in state guidance; home quarantine is a local option reserved for low-risk cases, and the owner signs an order accepting its conditions15. A dog held under veterinary observation can be released after 5 days if a veterinarian certifies it is healthy14. The health officer can also authorize euthanasia for rabies testing, with the owner's permission14. See dog bite quarantine rules by state.
Quarantine is a health measure, not a finding that the dog is dangerous. That is a separate process.
How a dog is declared potentially dangerous or vicious
Chapter 9 of Division 14 of the Food and Agricultural Code, enacted in 1989, sets two classes16:
- A potentially dangerous dog is one that, unprovoked, bites a person causing less than a severe injury; or twice within 36 months forces someone off the owner's property to defend themselves; or twice within 36 months kills or injures a domestic animal off the owner's property16.
- A vicious dog is one that, unprovoked and aggressively, inflicts severe injury on or kills a person, or a listed potentially dangerous dog that repeats the behavior or is kept in breach of the rules16. Severe injury means muscle tears, disfiguring lacerations, multiple sutures, or corrective or cosmetic surgery16.
The process starts when an animal control or law enforcement officer finds probable cause. The head of the shelter, animal control department or police agency then petitions the superior court, or a local administrative hearing body if the city or county has one17. A complaint from a member of the public should be sworn and attached where possible17. The owner is served and the hearing must be held 5 to 10 working days later. It is public, there is no jury, affidavits and incident reports are admissible, and the standard is a preponderance of the evidence17. The hearing can proceed if the owner does not appear17.
If the dog poses an immediate threat, officers can seize and impound it until the hearing. The owner pays the cost of keeping it if the dog is later declared potentially dangerous or vicious, and may be allowed to board it at an approved kennel or veterinary clinic at the owner's expense17.
When a dog cannot be declared dangerous
No designation is allowed if the injured person was willfully trespassing or committing another tort on the owner's premises, was teasing, tormenting, abusing or assaulting the dog, or was committing a crime. The same applies if the dog was defending a person nearby from an unjustified attack, or was working as a hunting, herding or predator-control dog on its owner's land17. Police dogs at work, licensed kennels, shelters and veterinarians are outside the chapter16.
Appeals: five days
The owner is notified in writing. Either side can appeal within five days of receiving the decision17. The appeal goes to the superior court, or to a different judge if the first hearing was in superior court, and is heard again from the start without a jury. That decision is final17. Compliance is due within 30 days of the determination, or 35 days if notice was mailed17.
What the owner must do
A potentially dangerous dog must be licensed and vaccinated, and the designation goes into its license record18. At home it must be kept indoors or in a securely fenced yard it cannot escape and children cannot enter. Off the property it must be on a substantial leash under a responsible adult's control18. The owner must notify animal control in writing within two working days if the dog dies, is sold or given away, or leaves the city or county18. If 36 months pass without another incident, the dog comes off the list; animal control can remove it sooner if training or other changes reduce the risk18.
State law sets no insurance or bond requirement. Cities and counties can adopt stricter programs, including misdemeanor penalties20.
Euthanasia
A dog found vicious may be destroyed when releasing it would create a significant threat to public health, safety and welfare. If not destroyed, the court sets conditions on ownership, which can include an enclosure meeting the statute's standard18. The owner of a vicious dog can be barred from owning or keeping any dog for up to three years18. Outside the hearing process, Civil Code § 3342.5 lets any person, the district attorney or a city attorney sue the owner of a dog that has bitten people on two separate occasions; the court may order the dog removed or destroyed. Bites to trespassers do not count toward the two13. See dog bite euthanasia laws.
Criminal penalties
Violating Chapter 9 carries a fine of up to $500 for a potentially dangerous dog and up to $1,000 for a vicious dog19. The serious exposure is under the Penal Code. Section 399 makes it a felony when an owner who knows of a dog's dangerous propensities lets it roam or fails to use ordinary care and it kills a person who took reasonable precautions; serious bodily injury is chargeable as a misdemeanor or felony21. Section 399.5 covers dogs trained to fight, attack or kill: two bites, or one causing substantial physical injury, can bring county jail, two to four years, or a fine up to $10,000, and the court may order the dog removed or destroyed after conviction22. See dog bite criminal charges.
Breed rules
California bars breed-specific dog laws. A city or county may adopt breed-specific spay/neuter and breeding requirements, but may not declare any breed potentially dangerous or vicious, and must report bite statistics to the State Public Health Veterinarian2023.
If the dog bites again
A listed potentially dangerous dog that repeats the behavior becomes a vicious dog by definition, opening the way to euthanasia and an ownership ban1618. A second bite also allows a § 3342.5 lawsuit13.
Rules for a declared dog in California
| Requirement | Rule |
|---|---|
| License and vaccination | Required; designation entered in the license recordAn extra fee may be charged.18 |
| Confinement at home | Indoors or a secure fenced yard children cannot enterPotentially dangerous dog.18 |
| Off the property | Substantial leash, held by a responsible adult18 |
| Notify of move, sale or death | In writing within 2 working days18 |
| Deadline to comply | 30 days after the ruling (35 if mailed)17 |
| Liability insurance | None under state lawLocal ordinances can add rules.1820 |
| Vicious dog | Court-set conditions or euthanasiaOwner may be barred from having any dog for up to 3 years.18 |
California rules in brief
Reporting. In a declared rabies area, the local health officer must be notified whenever a person is bitten by an animal of a species that can carry rabies, whether or not the animal looks sick14. The state has declared all 58 counties rabies areas every year since 1987, so every dog bite to a person in California is reportable15. The California Department of Public Health reads the rule as requiring a report of all mammal bites to the local health officer, usually through county animal control or public health26.
Euthanasia. A dog declared vicious after a hearing may be destroyed if releasing it would create a significant threat to public health, safety and welfare; otherwise the court imposes conditions18. The owner or the agency can appeal within five days of receiving the decision, to a de novo hearing in superior court17. Separately, after a dog has bitten people on two occasions, any person or a prosecutor can ask a court to order the dog removed or destroyed13.
Criminal penalties. Under Penal Code § 399, an owner who knows a dog is dangerous and lets it run loose or fails to use ordinary care commits a felony if it kills a person, and a misdemeanor or felony if it causes serious bodily injury21. Owners of dogs trained to fight, attack or kill face up to four years and a $10,000 fine for two bites or one causing substantial injury22.
Breed rules. No city or county dog program may be breed-specific, except mandatory spay/neuter and breeding rules, and no breed may be declared dangerous as such2023.
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
- California Civil Code § 3342, California Legislative Information. Checked 17 October 2026.
- Priebe v. Nelson, 39 Cal. 4th 1112 (2006), CourtListener (Supreme Court of California opinion). Checked 17 October 2026.
- Gomes v. Byrne, 51 Cal. 2d 418 (1959), CourtListener (Supreme Court of California opinion). Checked 17 October 2026.
- Johnson v. McMahan, 68 Cal. App. 4th 173 (1998), CourtListener (California Court of Appeal opinion). Checked 17 October 2026.
- Uccello v. Laudenslayer, 44 Cal. App. 3d 504 (1975), CourtListener (California Court of Appeal opinion). Checked 17 October 2026.
- Li v. Yellow Cab Co., 13 Cal. 3d 804 (1975), CourtListener (Supreme Court of California opinion). Checked 17 October 2026.
- California Code of Civil Procedure § 335.1, California Legislative Information. Checked 17 October 2026.
- California Code of Civil Procedure § 352, California Legislative Information. Checked 17 October 2026.
- California Government Code § 911.2, California Legislative Information. Checked 17 October 2026.
- California Government Code § 945.6, California Legislative Information. Checked 17 October 2026.
- California Civil Code § 1431.2 (Proposition 51), California Legislative Information. Checked 17 October 2026.
- California Civil Code § 3294, California Legislative Information. Checked 17 October 2026.
- California Civil Code § 3342.5, California Legislative Information. Checked 17 October 2026.
- Cal. Code Regs. tit. 17, § 2606 (Rabies, Animal), Legal Information Institute, Cornell Law School. Checked 17 October 2026.
- Investigation, Management, and Prevention of Animal Bites in California, California Department of Public Health. Checked 17 October 2026.
- California Food and Agricultural Code §§ 31601–31609 (definitions), California Legislative Information. Checked 17 October 2026.
- California Food and Agricultural Code §§ 31621–31626 (judicial process), California Legislative Information. Checked 17 October 2026.
- California Food and Agricultural Code §§ 31641–31646 (disposition), California Legislative Information. Checked 17 October 2026.
- California Food and Agricultural Code §§ 31662–31663 (penalties), California Legislative Information. Checked 17 October 2026.
- California Food and Agricultural Code §§ 31681–31683 (miscellaneous; breed rule), California Legislative Information. Checked 17 October 2026.
- California Penal Code § 399, California Legislative Information. Checked 17 October 2026.
- California Penal Code § 399.5, California Legislative Information. Checked 17 October 2026.
- California Health and Safety Code § 122331, California Legislative Information. Checked 17 October 2026.
- AB 793 (2025–2026): Potentially dangerous and vicious dogs, bill history, California Legislative Information. Checked 17 October 2026.
- AB 703 (2023–2024): Residential property insurance: dog breeds, bill history, California Legislative Information. Checked 17 October 2026.
- Rabies Information for Local Health Departments, California Department of Public Health. Checked 17 October 2026.
- California Government Code § 911.4, California Legislative Information. Checked 17 October 2026.