Jeremy, am hoping that maybe the Vet will have a more positive slant on things, if Jonah can be persuaded to eat again.
You and Lynn have both acted very much in Jonah's interests to date, and can be relied on to do whatever's necessary for his welfare, whichever way that may ultimately go.
Am hoping that the time is not yet for letting Jonah go, though. I know how very precious every single day is to the three of you. I think all of us do, and wish you well.