I'm sorry, but this dog looks so sweet and so cute. It doesn't look mean. It actually looks sad and scared. Look at it's little sad eyes and facial expression. I feel bad for the puppy, I don't think he was mean and intentionally wanted to hurt anyone. It just happened. It is definitely the parents' carelessness and lack of attention and protection to and of their baby.
Teresa Miller, who sold the puppy to the Hansches, was skeptical the dog did it.
"He didn't chew on anything while he was with me. Out of all of them (in the litter), he was the least chewy."
http://www.ktbs.com/news/local/4877961.html