Zoe update

I slept in the attic bedroom again last night. Zoe seemed weak and listless when I went in, and was huddling on the floor by the heater. She smelled weird, like bile. She got out of bed a couple of times in the night, to throw up a couple of teaspoons of foam. Then I'd clean her up and bring her back to the bed, and she'd snuggle and purr.
When I woke up this morning, she was in her cat bed on the floor. I cleaned up the vomit-foam that had happened while I'd slept. Now I'm off t...