I haven't used this place as I am in Mississauga, but I have ordered merchandise from them before.. maybe you want to check them out... At the very least you could go in sometime and get a feel for the place.
http://www.johnandrewforpets.com/spa.php
This site has a few listings of Toronto dog groomers too...
http://www.torontodogs.com/misc.htm
Hope this helps!