Fish has a shaved belly and a long incision. No visible stitches (surgical glue is a wonderful thing). He'll be on antibiotics for a week and a prescription food--cans for now, then a bag of dry stuff before I transition back to his normal diet. I asked about the need to restrict his activity, but that's clearly not a problem at this stage--he's sore and not going to move more than necessary. "Necessary" includes staying as close as possible to me, of course.
Total damage was about $560. That's really not as bad as I had imagined, though the only other cat surgeries I've paid for were spaying (for Agatha) and neutering. This incident also involved multiple X-rays and assorted shots. That was one expensive cat toy!