Delilah the Siberian tiger perched testily Thursday evening on the roof of her new house at the Cat Tales Zoological Park north of Spokane. Her mate, Samson, had retired for the night and their offspring, Romeo and Juliet, were nowhere to be seen. Zoo director Debbie Wyche and her mate, general curator Mike Wyche, were worn out from moving the homeless feline family across the state, and the sky was leaking cold slush.