well, I think he's got hound maybe. His hair is course & bristle type. I know this sounds weird but at first when I look at him, he looks like some dane except for the fact he's pretty short. To give you an idea how tall he is, My dog is 27" to his shoulder & when this dog stands next to him, this dogs head comes to about my dogs shoulder.
I don't see lab, & I don't see Rottweiler
His body type screams "Boxer" but his head is too damn different. He's got really Big Paws but a skinny whip tail & very small/skinny in the loin area.
They've had this dog for a month & every morning I look at him & can't figure out what the hell he is.