Ok, I've been through this with Pouncer. The little bugger can hide in the darndest places. Do you have a pull-out sofa? They can squeeze up in the fold out mechanism. Someone I know had a cat squeeze into an impossibly small space INSIDE a desk drawer that was CLOSED... can you check there? Does daddy play golf? Could he have gotten into a golf bag? Gym bag? Oh, gosh I wish I could be there to help you look for him!