Potentially dangerous dogs

At-risk dogs

If your dog attacks, bites or attempts to bite a person or a pet, he or she will be considered an at risk dog and may be subject to a veterinary examination to determine how dangerous the dog is. 

You have 72 hours to advise the city of your dog’s aggressive behaviour by contacting 311. While awaiting the results of the assessment or a notice from the city, you must:

• Muzzle your dog using a basket muzzle when outside your home or the home of anyone acting as your dog’s guardian.
• When outdoors, you must keep your dog on a leash or in a fenced area with fencing that is too narrow to allow a person to stick their hand or food through the mesh. 
• Keep your dog in the same location.

You can choose to surrender your dog (to shelters or veterinary clinics only), as long as you notify the city two days in advance and provide proof three days after surrendering your dog. 

After the examination, the dog may be categorized as potentially dangerous.

Potentially dangerous dogs

If your dog is declared potentially dangerous, you are required to comply with specific guardianship conditions::

• Have the dog vaccinated against rabies, spayed/neutered and microchipped.
• Get a special permit.
• Have your dog wear a tag issued by the city.
• Make sure your dog is supervised by someone 18 years of age or older.
• In the presence of a child under 10 years of age, ensure that the dog is constantly supervised by a person 18 years of age or older.
• When your dog is outside the guardian’s homeoutdoors, make sure he or she is muzzled at all times with a basket muzzle.
• Keep your dog on a 1.25 m leash (maximum) except in dog parks and fenced-in spaces.
• Clearly indicate to passersby that there potentially dangerous dog in your home by posting a sign that is visible from the street.
• Keep your dog at least 2 m away from any child under 16 years of age.
• Notify us no less than 48 hours before you move or separate from your dog.

If you fail to comply with any of these conditions, you may be subject to a fine and may lose your special license.

• Registry of potentially dangerous dogs [PDF 119 KB]

Bringing a potentially dangerous dog to Montréal

You are not allowed to bring the following dogs to Montréal:

• Dogs that are subject to a euthanasia order
• Hybrids (for example, a dog that is a cross between a wolf and a domestic dog).

If your dog has been declared potentially dangerous, has already bitten or attacked or tried to bite or attack a person or pet in another town or city, you must contact us at 514-872-0311 prior to your arrival for verification.