Good news! Zoe is home! Much to our delight (and Zoe's, too), the vets at Cornell Veterinary Specialists pronounced our girl fit to come home today. Upon her arrival home, she enjoyed a little snack, and a nice cool drink from the fountain.
And now, she's resting comfortably in her crown princess bed:
Zoe's still a little wobbly, which they said is normal after an episode like this. We have to (try to) keep her from climbing things for the next week or so, and have her checked by our regular vets in 5-7 days, but she is home and happy. Sister Gracie is noticeably brighter now that Zoe is back. So are Tracey and I. :)
Not sure what caused all of this, but we will consult with our vets to see what we can/should do moving forward.
Thank you, everyone, for your concern and care. We love and appreciate you all, and will keep you posted.
Hugs and headbonks,
Kevin, Tracey, Gracie and Zoe