I realize I kind of left you hanging with the whole cat situation, in that the last time I wrote about Bub he wasn't eating... Well, the not-eating scare is over! It was over pretty quickly, actually. He started eating again after 5 days or so - too long for my tastes, and he lost a fair bit of weight, but he's put it all back on (and then some). His whiskers are coming in like gangbusters right now, and his tail is getting fluffier. In short, our boy's back. And we're very happy about it.
He'll need to go in for monthly checkups to get poked around the middle to make sure the tumor's not coming back, but unless they find something suspicious, that's all he'll have to do. He doesn't know it yet, but he's very happy about that, too.