Hi Home2strays,
My heart goes out to you, and I think all of us who have been in your position know how you feel. It is easier to be objective about other people's pets ... but when it is your own, it is very difficult to know and not get lost in second guessing and uncertainty. My beloved kitty, Macrina, died in Dec 2008 from pancreatic cancer, and memories of that struggle are still vivid for me.
I think I've posted this before ... but are you familiar with the "Quality of Life Scale" that was developed by a veterinary Oncologist a few years ago to help give some objectivity to deciding when it is time? It is sometimes called the "HHHHHMM Scale" which stands for:
Hurt
Hunger
Hydration
Hygiene
Happiness
Mobility
More Good Days Than Bad
For each area, a score is given from 1-10 (1 is worst, 10 best). If the total of the scores is greater than 35, then it suggests that the pet still has a satisfactory quality of life.
The scale is found in multiple places on the internet. Here is one which gives summaries for each area of what to look for, and there is a link to a pdf version above the scale on the webpage:
http://www.veterinarypracticenews.com/vet-practice-news-columns/bond-beyond/quality-of-life-scale.aspx I wasn't aware of this scale back when my kitty was dying. But since you work at a vet clinic and hopefully have a good relationship with the vet(s) there ... I would recommend also what I did. That was to lean heavily on my kitty's vet and her Internist, both of whom had become good friends, and whom I respected and trusted. I remember well the day my kitty's pancreatic cancer was diagnosed (via aspirating lymph nodes and finding pancreatic cells, so it had already spread). I was in a state of shock and my vet promised me she (and my Internist friend said the same later) would not let my kitty suffer. They both knew my kitty well, and had years of experience recognizing the final stages and if Macrina was in pain. We used Fentanyl patches for continuous pain relief and she seemed to be pain free till the last couple days. But, I guess my point is ... that I had a great relationship with Macrina's doctors and I leaned on them to let me know if I was waiting too long. I trusted them to have the objectivity that I lacked. Of course, they left the decision to me, but I did lean on them.
In the end, on that last day, I could see it in Macrina's eyes, that she was tired and ready to go ... though my broken heart still was uncertain. But her vet agreed that it was time, and even though she made few house-calls, she agreed to come to my home (with a Vet Tech) at the end of the work day (8pm) and do the euthanasia. I think Macrina was waiting for her and died very gently and peacefully.
I know how hard this is (and I'm wiping away my tears now as the memories come back). I think the Quality of Life scale is a help in putting a little objectivity into a very subjective decision. For me, a major consideration was pain and discomfort. As long as my kitty was comfortable and attentive with an active interest and enjoyment in life, and was eating without too much coaxing ... I felt she had a right to live. I tried to wait for her to tell me she was ready to go ... and leaned on my vet friends to help me read her.
Never forget that your dog knows you love her ... and whatever decision you make is correct, because it is rooted in love.
Stephanie in Montreal