I'm really sorry to hear about your dog. We lost our beloved 14 year old lab, Harley, a year ago last month. It was devastating, and your story about your dog's final days reminded me so much of my big puppy's fight at the end. It gets better, as they say, but I STILL have days when I miss him terribly (like yesterday, when I was mowing my back yard, and I just started thinking about how and where out there he loved to play).
It sounds like you gave her one great life, and vice-versa. As hard as it is, I do see how my kids grew thru both my dog's life AND his death, and will forever cherish the way we were allowed to say all of our good-byes.