I wonder if she passed of a heart attack or something and he was unable to care for himself and also passed. I just read an article that showed the last public photo of them out, which was a year ago and he was 94 then. And he needed her assistance and a cane to walk. So maybe he was bed ridden at this point, for the past year, and she passed away of natural causes and that left him unattended. Wonder how long they'd been gone? Guessing long enough for the poor doggy to also not get care (food and water).