you can find more info at http://www.portcreditpets.com/H/toexpo.htm
Here are the directions from the PortCreditPets site.
Where?Right in the heart of Mississauga. 765 Third St, just East of Cawthra Road. In the Army, NAvy Air Force Club. DIrections from the 401 are simple-401 to 427 South to QEW westbound, QEW West to Cawthra road and travel south to Third St, make a left and approx 100 meters on the north side.