I know this is a long shot but in the classifieds of Vol. 5, Issue 3 Canadian Pets and Animals there is an ad for a lost brother and sister pair collie/shepperd mix (they are both fixed though). I can't access the website properly
www.petsandanimals.ca to see if the ad is there. They are chipped and were recently adopted/ran away from the Midhurst area. You can pm me for the telephone numbers if you like. It's a long shot ~ but hey, you never know...