The writer was also able to identify signs from her dog (over a couple of emails). In this blog, though, I'll show you exactly how specific a dog's sign can be to prove their identity.
The ORIGINAL EMAIL: Hi Rob, My good friend lost her Chica yesterday after a very sudden onset neurological type (head) event. We are in shock, she had no indication that anything like this would happen, in fact had a checkup with her vet the day before. Unsure what it was, tumor/aneurism/infection etc, but hope she went peacefully and not anxiously as she had to be rushed to the vet (where she was never comfortable) for her euthanasia.