The dog looks a bit disappointed, like he was hoping the boxes contained something tasty, but it's just more of those damn bitcoin miners again!
That looks like a Bull Mastiff looking for something to play with, preferably a postman
We used to have a couple of Old English Mastiffs, they used to love playing with the postman as well
https://bitcointalk.org/index.php?topic=297320.msg3487775#msg3487775