I am so sorry you had come to the point where you needed to say goodbye. I know just what you are facing as I am close to that point with one of mine, and go through the ups and downs you describe well. It is a horrible condition and takes away too many dogs, too soon. I am so glad you found it of special help to be there through to the end–sometimes people feel they might not have the courage and are afraid to be there, but I really think that not only does it make a difference to your long-time companion to have that company just as they stood by us for so many years, but it actually brings a sense of peace and closure to be there to bear witness.
Please make a post if you'd like in our memorial section where you could include some photographs, if you feel you would like to do this at any time in the future.