Chicken croquettes in GTA ?
There is a very recent thread with suggestions on this very topic here -
Not chicken, I know, but The Citizen apparently (haven't been there myself) has great veal croquettes. Even though reviews of The Citizen on this board are mixed, most like the veal croquettes.
And Amy Pataki in the Toronto Star also raved about them a few months ago -
730 Queen St E, Toronto, ON M4M1H2, CA