How devastating for you, and I am so so sorry you have to endure watching your much loved girl in this condition. It won't help knowing I and many others have lost our very special dogs also, but we do know how you feel......try and enjoy each and every moment you have with her.
Bless you, my heart breaks for you and yours at this awful time.
I and many others are thinking of you and it may well help to put your feelings on the forum to get as much support as you can, which I know we will all try and give.
Take care
me and my crazy pair