I'm so sorry that the good news went so bad. Poor Luba, her meowmie, and you Slick. It's breaking my heart and I even had to shed a few tears when you asked us what decision we would make. It's a horrible thing to send them on to RB but IMO I think it is more horrible to put her through feeding tubes and possible force feedings. I wouldn't want her last memories of life to be of such drastic and very frightening extremes when you know the inevitable is still coming.
God didn't answer our prayers for her to be whole and healthy again. We don't know why but there is a master plan. Luba is much needed on the other side.
May God grant peace in Luba's meowmie's heart and yours as well Slick. When the time is right may God make Luba's passing easy.
You are ALL in our thoughts and prayers.