omg, i washoping sooo much to come on and see that you have found him!my heart is breaking... i can't imagine how you must feel. i wish i could help you look. did you check in any closets you have? a friend of mine losy hers for 2 days and finally found him down inside the arm of one of her sweaters. ( must have tired himself out trying to escape and made no noise. he was all hunkered down and mildly tangled bird claws and knitted clothes hook together real good. i am not trying to be nasty or gross, but... have you watched the dogs poops? if, heaven forbid, one of your suspicions is true, there will be evidance there. i'm soo soorrrry to suggest that, but at least you will know solved your problem re: where he has gotten to.
wish i could say or do something to heap you, it's soo awful to be thinking about it. all of me is watching for you , the other half is praying
hope he is found soon