Well, it is obvious tha the best you can do is to apply to some reliable local broker specializing on all the aspects. Check out this one https://clearit.ca/services/customs-consulting. I had numerous questions regarding my car import. Clearit staff answered them in a timely fashion, and helped me throughout the process. Simply give them a shot. Good luck
Yet another classic case where you should be asking if before you ask why. Canada is by far and away a net exporter of food. The Canadian Prairie provinces have long been known as the bread basket of the world because of the amount of wheat produced and exported from there. In addition to grains Canada also exports large amounts of meat, fruit and other food products. Really the only things that Canada imports a lot of are tropical type fruits and vegetables that can't be grown here.