Ontario law requires all dogs and cats be immunized against rabies starting around 14 weeks of age, with re-vaccination at one year old. Boosters are scheduled annually or every three years, depending on the vaccine and local regulations. This goes a long way toward protecting our companion animals from this dreaded disease, but rabies is far from eradicated. Whether your pet gets into a scuffle with wildlife or another pet, it’s critical to proceed as if your pet was exposed to rabies.