I don't understand the daggers being thrown at this poor woman. She had the dog for 16 years and I'm sure is completely devestated by what happened - an obvious terrible mixup. To even put that story in the same context as the controversy surrounding Michael Vick is absurd. I can't imagine the sorrow she must have felt when discovering her long time friend trapped in that car.
Sounds like a terrible and tragic mistake. As someone pointed out, there are people who forget their CHILDREN are in the car. If her husband put him in there and he never made a sound, then it sounds like an honest mistake. It doesn't make it any better an end for the old dog, but I would not cast the first stone.