I've actually heard the story on a couple of American news shows. Granted, the key word here is "American," so credibility is kinda... meh... but still.
I think there is a possibility that the story is true. It would be highly unlikely if it was, but it could still be true. Even so, I find it hard to believe that the dogs suffered absolutely no brain damage during the process. Then again, I don't know anything about the preservative properties of saline solution when applied to the brain... I wonder if it's the same stuff they use to make breast implants and nasal spray.
I keep getting this horrible mental image of the zombie dogs Resident Evil now...