When you have a senior cat with serious health issues, every day can feel like a rollercoaster. Some days are good, and some days make you want to tear your hair out in frustration. Food that was gobbled up in the morning, suddenly earns you a look of disgust at night.
Sometimes warming food up in the microwave can tempt them to eat. On really bad days with Bandit I will sometimes raid the freezer and cook up whatever meat I can find to try and get him to eat. Sometimes really crappy cat food can help get them eating again too, as their taste and smell always seems more attractive to cats than the higher quality foods.
Keeping them hydrated is also important. Bandit can sometimes get stuck in a vicious cycle where he doesn't get enough fluids, so he gets dehydrated. This in turn makes him go off his food and then he feels even worse and if you don't catch it in time, it spirals out of control and he is at the vet on a drip.
Good to hear she ate something though. Hopefully having something in her stomach makes her feel a bit better. It's always a relief when you can get a solid meal into them.