Report a dog that bites or behaves aggressively

Have you seen a dog display signs of aggressiveness? Have you been bitten or are you the owner of a dog that injured a person or an animal? Find out how to let us know.

Signs of aggressiveness

Call us

Growling, snapping or tensing up can be signs of aggressive behaviour in a dog. Call us to report a problem with a dog.

Sometimes dogs bark just to express themselves, and if there are no other signs of aggression, it is simply a nuisance.

311

Outside of Montréal: 514-872-0311

Monday to Friday: From 8:30 a.m. to 8:30 p.m.
Saturday, Sunday and public holidays: From 9 a.m. to 5 p.m.

Dog bites

Dog bite victims

Regardless of the severity of the bite, report it to your neighbourhood police station. To have the bite treated, see a doctor or call Info-Santé 811.

Service de police de la Ville de Montréal

Dog owners

Has your dog bitten a person or a pet? As an owner, you have obligations: 

  • Contact 311 within 3 days of the assault. The dog can then be examined by a veterinarian to determine his or her condition and whether he or she is dangerous. 
  • Keep your pet in a fenced area, which prevents anyone from inserting their hand or foot.
  • Muzzle the dog with a basket muzzle when outside the home, especially in a common area, front yard, back yard or side yard.
  • Keep your dog in the same place until further notice from the city.

Legislation

Last updated June 11, 2026