She's doing even better this morning. Walking with stronger hind legs in particular, she obviously drank from her bowl overnight, and is generally more alert.
This is obviously still a very ill cat, but I was genuinely surprised to see how perky she is this morning.
She's not super happy about being trapped in a bathroom and is pacing quite a lot, but it's a big improvement on a cold and wet pavement, so I think she's just going to have to suck this one up.
Later, I'm going to have to box the kitty, break out the veterinary disinfectant and very thoroughly clean down the floor. Litter trays are an alien concept to this kitty and spot cleaning isn't really cutting it.
(Apologies for having turned into the stray cat updates channel. Regular service will resume when I'm less preoccupied by this.)