[Silverbleed]

Well I'm absolutely sure it's the fault of the owners. 'Taming' a dog is more simple that you might think. You can even 'tame' cats. I teached mine to give a paw and to sit down before he'll get his food. If the owners can't handle him, they shouldn't have a dog in the first place. Their second dog might be most likely just the same if they get another.
It's not really the fault of that dog, he probably doesn't even know he's doing wrong >_> Because nobody tells him. The owners are to blame here.