Wendy, don't you EVER feel guilty! I am thrilled about Twiggy, just as I'm sure we all are. Meeting her was meeting a miracle and a star.
Kristin, I just lost my second dog to osteo. As has already been posted, not using the leg is an indication of pain. When I lost Phoenix to osteo a couple of years ago, my vet said that if he was showing pain, he had to be in a zillion time more pain than we see. I'll never forget that.