It's two days since Oona ate anything. So, she has oddly developed two opposite problems:
1. Was eating so much before that she's fat. So fat that if you put her on her back she actually can't right herself, will just kick and kick and stay stuck but will still complain if you turn her right side up again.
2. Is now eating absolutely nothing. Even an effort to soften the normal food, well, I see proof she attempted to eat it and then gave up.
Defcon 2; time to get her some wet cat food, just so she might actually eat something. Unfortunately, that's a poor choice for the obesity problem. Just sigh and accept the horrid mess you can expect when you feed these guys cat food. And consider yet another veterinary appointment.