The Canadian North pet policy is as follows:
Live animals are accepted on your flight for transport in the cabin or in the baggage compartment.
Arrangements must be made a minimum of 24 hours prior to departure by contacting Canadian North Reservations at 1-800-267-1247.
For all Summit operated flights, they are very restricted to having pets in the Cargo hold. They are limited to taking only 1 medium dog 35lbs, height of kennel cannot exceed 26″ high.
The number of animals accepted is limited per flight and may require the modification of your reservation to allow the airline to accommodate your pet.
Live animals will not be transferred onto another airline and arrangements must be made with the other carrier.
Taking a pet to a foreign country involves preparation and planning far in advance of your departure date. Requirements for pet travel to a foreign country are set by the destination country. If you are you traveling to another country and bringing along your pet you’ll need to meet the animal health requirements of the country you are visiting.
More information on the Canadian North pet policy