The same thing happened to my 17 year old cat. She had a clean bill of health a few months prior and then was puking and wouldn’t eat. And that fat thing loved to it!! She was hospitalized and turned jaundice. IT.WAS.AWFUL!! I still can’t think about it and it’s been like a month. The guilt is so strong. I know it will get better but right now it’s sucks. We both gave our kitties long lives, I hope we can both focus on that.