I'm so sorry for your loss, Indysteel.

I know how hard it is to make that decision and to this day, I still question if my timing was right in a similiar situation. I hope you find peace with it (if you haven't already). FWIW, it sounds like you did exactly the right thing.

Sophie obviously led a wonderful life. You two shared a bond that was special and that will remain unique throughout your life. I feel the same way about my 11 years with my dog (also adopted after graduation and who was by my side when I was single and alone). Treasure the memories.