Humans! The only consolation is the dog isn't bright enough to know what humans did to him.
We don’t know that for sure. It’s like that movie with Robin Williams and Robert DeNiro where Robin is like a psychiatrist and Robert DeNiro is some kind of catatonic retard that Williams and that chick that was Rhoda’s sister on Mary Tyler Moore show feed LSD to. It’s like that only with dogs. We hope they are not aware of what’s been done to them because the alternative is unthinkable.