Checkerboard and Grace have a room to themselves for awhile. The other inside cats are visiting but no bodily contact. Grace is grooving on it and ready to come out but Checkerboard is another matter, can't approach him. They have very different desires but they can't be separated at this stage of the game.
Diarrhea is an issue that must be treated before sharing litter boxes or food bowls. We're taking this very slowly as they have been in before but never tolerated more than a week inside before coming undone. It is very overwhelming for them to look up and not see sky.
Grace is one of the most loving beings I have ever met and will do fine but we go as slow as the slowest among us.