Thank you. I know you are right. I am trying to stop beating myself up, I took her as soon as I thought it was necessary, but I can't shake the feeling that maybe I should have done it sooner. Who knows. I do believe that she did not suffer from a lot of pain, even the vet said that, so I will try to take comfort in that. I just get so attached to all the pets we have, even the fosters. And it is hard when they leave this world suddenly.
I am hoping the necropsy sheds some light on exactly what was happening, and it gives me some closure.
Hopefully it will, sadly when we care we think that gives us superpowers to have a window into all that is ailing, it doesn't.