~hugs Ricki~ I can relate, as we went through this with my grandmother over 12 years ago. :\\\'( I felt, in a lot of ways, I had already let go of her - as my grandmother - years before. She had the cursed Altzheimer's...it truly is "The Long Goodbye". So, her as the wonderful, amazingly talented and intelligent woman I had known was gone long before she stopped eating and drinking. There at the very end she had a couple of lucid moments - as if she "came to" to say her own goodbye.
I hope your own sweet grandmother's leaving this plane will be peaceful. ~more hugs~