Wouldn't be surprised if the dog was left alone in the garage with the Aston. Probably didn't get enough attention and I bet Mr Grim gave it a good beating before giving it away.
I don't know either way, but there is no way to know for sure, whether that dog was ignored or beaten afterwards.
I bet most of you would be pissed off a dog ate its way through a freshly restored mini project.
But I look after my dog, so she wouldn't eat my Mini.
All I can say is it serves him right for not looking after his dog properly, there's no way an obedient, looked after dog would do something like that.