We made the hard decision to let him go, knowing that he wouldn't do well in a hospital, in fact he didn't really like being medicated twice a day. And spending two weeks minimum waiting to see if he'd improve just didn't seem fair for a kitty used to spending his days roaming a large grassy yard.
He passed peacefully in my arms, and his "groupies" Rocky and Hot Rod had the chance to say goodbye too. Even Pepper paid her respects.
Rest in peace sweet prince, you will be deeply missed...