Starting November 10, 2016, Canadian citizens, including dual citizens, will need to show proof they are Canadian to board their flight to Canada.
This means that you will not be permitted to board a Canada bound flight if you do not have your valid Canadian passport, unless you have a Electronic Travel Authorization (eTA)
Please read the links below very carefully:
Electronic Travel Authorization (eTA)
Government of Canada Website
Email: CIC-ETA-AVE@cic.gc.ca Call: 613-437-9397