cats losing equilibrium

I was wondering if there was any resolution to this because my 3 year old cat started doing the exact thing yesterday. I woke that morning and I noticed that when she jumped on the toilet seat she swayed to the right a little. A red flag went up then, later when she jumped on my entertainment center she nearly fell off, which she never does she always lands perfectly. I immediately took her to the vet and they’re clueless, her bloodwork is fine and her ears are clean with no infection. I had her boarded at the vets so they can intravenously support her because she’s not eating or drinking. They’re talking about doing a complete neurological workup on her but that’s going to be costly, but whatever it takes to make her back to normal I suppose. So please let me know what became of your cat.