Stunning dog! I am not at all sure of the breed, but I can say that the first thing I thought was "rottweiler mix" because of something with the eyes and face (and paws) looks very much like my roommate's American rottie. I do know that her now very well behaved dog was a terror as a puppy, and most of the front of the house has been completely eaten (all the shutters for example are eaten halfway up!), and counters and chairs are still eaten away from his puppy days. I know she said she had to treat him differently than past dogs because any physical touch escalated him, and that respect from him was a hard won battle. I know that crate training was implemented. He is a complete gentleman these days though, and was well worth the time and effort and learning curve for how to train him.
I'd suggest talking to people who have owned very destructive breeds/dogs, and see what methods they use.
That said, no idea if there is any rottie or any mastiff type dog in there.
