DCat is very old, with multiple health conditions. She picked up an infection a few weeks ago and after initially responding well to targeted antibiotics has gone down hill again. I'd talked to the vet about this possibility so we're going to give her a few more days then this is it 
Kids are 3, 5 and 7. 7yo has got extremely upset at the idea of DCat dying. Not sure when to say something to the others.