It's amazing how negligent some pet owners are. I mean, I can almost understand shitty parents because hey, some people have kids as accidents. But it seems like you actually have to make the decision to acquire a pet.
I don't think we've heard anything to establish that the owners were grossly negligent. Maybe the dog was inside, a door wasn't fully closed, and it heard a cat outside, decided to run after it, and that's how it all went down? Maybe the owners are lousily irresponsible, but maybe it was an innocent accident that could happen to just about anyone.