Lucky: how often do you feed? Can you add an extra meal in somehow? Some (not all ) of my older cats just needed to keep something in the stomach to prevent the bile vomiting. Don't know why, but if all the blood work looks good, that may be a solution to try.

I sympathize with you and your Dad and the situation. Not sure I can give any guidance. According to MY Dad, he was "kidnapped," one Saturday. When he refused to come, I told him "That's OK. I 'll take all your clothes, and when you are ready for a change let me know."

That is not exactly what happened . . . .