That's awful news. I remember having "the talk" with the vet, but to have the dreaded event happen a week later was just devastating.
On a side note, it was interesting to see Rocky (Boston #2) grow up that day. He went from annoying puppy, to senior statesman. Now Rocky is getting up there in age (he's 8).
I feel your pain.
This really helped me grieve. I made two videos of my memories of Niki:
I found some more photos later and made this one (this was more for me). I was still pretty down about losing Niki.