"Fedora, one of our two wonderful cats, has something seriously wrong with her, neurological impairment, fever, etc. Worse yet, it's going to cost another $700 or so in lab fees to find out what it is, let alone if it's treatable, or contagious to Brancusi, our other cat."
I came home from work to hug meg and cat, we've isolated Fedora for the moment so that Brancusi doesn't get infected if he's not already.
There's an outside chance that she bonked her head on a door-jamb really hard, we're keeping our fingers crossed that that's the case.