EDITED: CLEO HAS BEEN FOUND!! YAY!!
(via Colleen): "Writer Kim Werker's beautiful dog Cleo has run off, spooked by the sound of the avalanche-explosives. If you live near the Vancourver, BC area, can you please help her look for her dog? Edit to add: Tracks seen northbound Hwy 99 (past Emerald, Whistler BC)."