Melissa Kaplan is the author of dozens of articles regarding any herp or amphibian species you could ever think of. For any information on a herp species, check for her articles before you look anywhere else. The following link will take you to her corn snake care sheet that includes answers to most questions people new to corn snakes will be seeking information on: http://www.anapsid.org/corn.html
Ruth Hanney is Canada's foremost expert on corn snakes and she produces some of the more uncommon morphs. She's located in Ontario and usually attends the larger Canadian Reptile Shows, including Red Deer, Winnipeg, Mississauga, and Montreal. If you're looking for a corn snake that you can't find in Western Canada, Ruth is the person to talk to. http://hanneyscorns.tripod.com/index.html
Annette Thompson has been breeding reptiles for as many years as I have been alive; not only does she produce cornsnakes and ball pythons, but she deals some relatively uncommon snakes that take a significant level of expertise to breed. Whether you're looking for Cornsnakes, Green Tree Pythons, Hogg Island Boa Constrictors, Eastern Indigos, Woma Pythons, or just information, Annette is one of the first people you should contact. Not only is she great to deal with, but she is local too! Annette is located in Carsland, Alberta - a little East of Calgary. http://wrappedupinreptiles.homestead.com/
If you are interested in purchasing a reptile or amphibian in Alberta, you may find The Edmonton Reptile and Amphibian Society a great place to start looking for a breeder. This site also will provide you with information regarding upcoming reptile shows and ERAS meetings. http://www.edmontonreptiles.com/forum/index.php
Before purchasing any reptile from a breeder, check their reputation on the Fauna Classifieds Board of Inquiry. Many breeders have been discussed on this forum. You must be a member of the forum to view the threads; however, it is free and easy to register. http://www.faunaclassifieds.com/forums/forumdisplay.php?s=&forumid=614
Reptiles Canada is an online forum that many Canadian breeders regularly check. If you're looking to make some connections with big breeders, this is definitely a place to start. You can also have any of your herp questions answered very quickly. http://www.reptilescanada.com