Dog Bite Law Canada: 6 Steps After an Attack

Navigating dog bite law Canada generally triggers two separate processes: a civil claim for compensation and a municipal or provincial public-health investigation. Ontario applies owner liability even without prior knowledge or negligence, while cities may impose dangerous-dog controls. Exact procedures, orders and penalties vary by province and municipality.

A reported bite creates three immediate concerns: preserving evidence, managing rabies exposure and understanding whether authorities may impose restrictions on the dog. Toronto provides a useful example, but its process does not automatically apply across Canada. This guide focuses on Ontario law and Toronto procedures, while explaining the wider national position.

The first priority is safety, followed by prompt reporting and careful documentation. In Toronto, a person can report a bite or attack through 311 or the City’s online service. Call 911 if the dog remains at large or the injuries are serious.

Toronto Animal Services states that it responds within two hours when the dog is loose and within 24 hours when the owner controls the dog. Its investigation may include:

• Interviews with the victim, owner and witnesses
• Medical documentation
• Photographs and other evidence
• Details about where and how the attack occurred
• Information about the dog’s vaccination and identification

Toronto Public Health may also open a rabies-exposure investigation within 24 hours. It can require the dog to remain confined, often at the owner’s home, for a 10-day observation period. Ontario requires rabies vaccination for dogs.

Keep copies of medical records, photographs, messages and witness details. If you own the dog, avoid arguing about fault at the scene. Instead, secure the dog and provide accurate contact, vaccination and identification information.

Source: City of Toronto, current online guidance; Government of Ontario, Dog Owners’ Liability Act, R.S.O. 1990, c. D.16.

A dangerous dog order can impose practical controls even after the immediate incident ends. Toronto uses a bite-severity scale from 0 to 5, based on Dr Sophia Yin’s canine bite scale. The City generally treats a Level 3 bite or above, involving a deep puncture, as severe.

A dangerous dog order may require the owner to:

• Muzzle the dog away from the owner’s premises
• Display a warning sign
• Keep the dog out of off-leash areas
• Obtain a dangerous dog tag
• Microchip the dog
• Keep a city-held photograph on file
• Complete socialisation or obedience training within 90 days

Toronto also maintains a public registry for dogs subject to a dangerous dog order. The listing can show a partial postal code, ward, dog name, breed, colour and the date and severity of the act.

The order is not the same as a criminal conviction. It is a municipal safety measure, and the exact obligations depend on the order and applicable by-law. Read every condition carefully. Record muzzle use, training appointments and veterinary assessments, because practical compliance may matter during later reviews.

Source: City of Toronto, current online guidance; legal basis identified by the City as Toronto Municipal Code, Chapter 349.

Ontario generally makes the dog’s owner liable for damage caused by a bite or attack, without requiring proof of negligence. Section 2 of the Dog Owners’ Liability Act says liability does not depend on the owner knowing the dog’s tendencies or acting negligently. However, damages can reduce in proportion to the injured person’s contributory fault.

That rule concerns civil liability. It does not prevent a municipal investigation or a court application about the dog’s future control.

The Ontario Court of Justice may also prohibit an owner from owning another dog for a specified period. These powers make early legal advice sensible when injuries are serious, a claim is threatened or authorities seek a formal order.

Source: Government of Ontario, Dog Owners’ Liability Act, R.S.O. 1990, c. D.16.

Ontario’s pit bull provisions create a stricter statutory pathway than the general dog-control rules. The Act bans owning, breeding, transferring or importing pit bulls, subject to its grandfather exception for restricted pit bulls already owned before the 2005 ban took effect.

Where an Ontario court finds that a dog is a pit bull and has bitten, attacked or behaved as a menace, section 4(8) requires a destruction order. The provision removes the court’s discretion in that specific situation. The Act also says that, where a municipal pit-bull by-law conflicts with the statute, the more restrictive provision prevails.

Breed-specific legislation remains contested. The Canadian Veterinary Medical Association supports dangerous-dog laws aimed at safety, but not breed discrimination. Its position states that breed-specific legislation has not been shown to reduce dog-bite incidence in areas where authorities enforce it. It also recommends veterinary or veterinary-behaviourist assessment as part of a formal dangerous-dog process.

Because rules differ between provinces, territories and municipalities, do not assume Ontario’s pit-bull provisions apply elsewhere in Canada.

Source: Government of Ontario, Dog Owners’ Liability Act, R.S.O. 1990, c. D.16; Canadian Veterinary Medical Association, “Legislation Concerning Dangerous Dogs”, reviewed 25 February 2022.

Build a clear evidence record while the details remain fresh. A calm, factual record helps medical professionals, animal services and any legal adviser understand what happened.

Use this practical BITE checklist:

1. B — Back away safely: Move behind a barrier and avoid a second confrontation.
2. I — Identify witnesses: Record names and contact details if people saw the incident.
3. T — Take photographs: Photograph injuries, torn clothing, the location and visible warning signs, where safe.
4. E — Explain consistently: Write the time, sequence, dog description, owner details and every authority contact.

Ask for copies of medical documentation and keep receipts connected with treatment or damaged belongings. Do not post accusations online before checking the facts. A public argument may complicate communication with the owner or investigators.

If the dog remains loose or injuries are serious, Toronto directs people to call 911. Otherwise, report the incident through the applicable municipal channel. Outside Toronto, contact the relevant animal-services or public-health authority and confirm its reporting process.

Secure the dog, cooperate with lawful public-health directions and preserve vaccination records. Do not release the dog until you understand the authority’s instructions. Keep the dog away from visitors and other animals, using secure confinement rather than relying on verbal control.

Prepare a factual information pack containing:

• Rabies vaccination details
• Microchip or licence information
• A timeline of the incident
• Witness contact details
• Existing training or behaviour records
• Photographs of the dog and the location
• Any veterinary records relevant to behaviour or health

Toronto Public Health may require a 10-day observation period. Follow confinement instructions precisely and ask the authority to provide conditions in writing. Arrange a veterinary or veterinary-behaviourist assessment when officials or a lawyer recommend one. Do not promise that the dog will never bite again, and do not alter records after the event.

Ontario courts can order destruction or impose control measures. An owner may also face a prohibition on owning another dog and penalties of up to $10,000 and/or six months’ imprisonment for contravening the Act or an order.

Source: City of Toronto, current online guidance; Government of Ontario, Dog Owners’ Liability Act, R.S.O. 1990, c. D.16; Canadian Veterinary Medical Association, 2022.

Treat the incident as both a health issue and a legal process. The safest next step depends on whether the dog is loose, whether anyone suffered serious injury and which authority has jurisdiction.

The term “dangerous dog” has no single national definition. The CVMA confirms that provinces, territories, cities and municipalities use different legal approaches. Therefore, the authority handling the report matters as much as the dog’s breed or the injury description.

For help locating a veterinary clinic for a behaviour assessment or vaccination records, search PetHealthMap and contact a nearby practice.

Dog bite law Canada involves overlapping civil, public-health and municipal processes. In Ontario, the owner can face liability without proof of negligence, while courts may impose control or destruction orders. Toronto may add a dangerous dog order, rabies observation and registry listing. Breed-specific rules create an additional layer for pit bulls.

Act quickly: secure the dog, protect people from further harm, preserve evidence and follow public-health directions. If your dog needs a behaviour assessment or updated vaccination documentation, use PetHealthMap to find a nearby veterinary clinic. Local rules vary, so obtain advice based on the province and municipality involved.