Lost Cat white with Black spots in Clondalkin

My daughters cat Pixie is missing since Sunday 13th Nov 2011. She is white with black dots on her back,on her head and her tail is black. She is only 1yr old and is quite a nervous cat. She is missing in the Woodford area of Clondalkin Dublin. She is microchipped. Could any people in my area check their sheds,thanks. She does go out during the day but usually stays in or around the garden. Any advice on what to do ??? My daughter is really upset [IMG][/IMG]