Hi Dan,
I'm so sorry that you are going through the hard times that come when our babies get older. They do get old too fast. My oldest kitty is 20 and she is getting pretty bad looking but she still loves to sit and love me so I do the best I can for her.
I will be praying for you and your Cat and hope she goes on without any pain. I have been through that heartache so many times, it never is easy. I'll be thinking and praying things go well for both of you. Love, Jeannie