Vet: "He likely won't eat much. Give him half his normal amount of food tonight"
Cat: Came home, gobbled a quarter of the usual amount, went looking for more. Fed more in an hour, he went looking for even more and knocked over a three-quarters full container of unpopped popcorn, possibly on the theory that it was making the right kind of sound when bumped. Ran like mad when it hit the floor and kernels went everywhere. Later, I hand-fed him dry cat food, which went okay except for his intense need to pursue any dropped kibbles. Over about six hours, he had about two-thirds of his normal amount and decided he probably wasn't going to starve.
Vet: "He may just go hide until he feels better."
Cat: Bounced around the house like A. A. Milne's Tigger, only more so. Attacked his scratching post (and the Feathered Thing atop it) and various mouse-shaped toys. When I went to bed, he had a toy Rannie discarded as too big, a kind of fat, furry rat that seems to contain a tennis ball and has a long, furry tail. He'd chased it behind the washroom door and was laying on the other side, energetically slapping the tail sticking out from under the door while working it around with his other paw, a combination of target practice and puppetry.
Vet: "He will probably be drowsy, especially after he gets his pain medicine."*
Cat: Behaves as though it is an energy drink. He finally climbed on my bed about 2:30 in the morning. He did manage to flop down next to Rannie (look, I'm mildly cat-magnetic; I didn't set out to suborn Tam's cat) without irking her too much and even restrained the urge to attack her tail. That's about the only change in his behavior so far.
("See this?" Rannie says, "This is my annoyed tail. It means Don't Touch." Huck: "Neato!" And makes a wild swipe at it.)
Vet: "No baths for the next two weeks."
Cat: No baths ever!
He's a house-tiger!
* Yes, they have pain meds for cats now. Kinda neat.
BUILDING A 1:1 BALUN
9 months ago