The cats that have been taken in for early symptoms seem to have pulled through okay, though at high expense, and I dearly hope that Mia will be one of those that can get through this. Positive thoughts sent your way that the others test negative.

Don't feel bad, although I know we can't help ourselves. I feed Fancy Feast to Ginger because that is what she will eat, and that's all you really focus on for a very old cat. I gave her left-overs, and there have been many, to the teenage cats and they love it. As you said, it was a treat that they love and you don't see any harm in it because it isn't their main food. There have been no recalls on Fancy Feast so far, but it's the kind of food that might be in a recall - so now Ginger's left-overs are tossed.