Thor lives across the street from me, a full grown Mastiff, and weighs in at about 200# but that depends if the weigh-in would occur before or after his bathroom break!
Anyway, his parents take him for walks and they bring with them a little red wagon like a kid would have. You see, there are occasions when Thor just gets tired on his walk and up and lays down, will not budge! It is about everything that Joe and Charline can do to lift Thor up into the wagon to pull him back home!
Dragging that dog through the neighborhood in a wagon embarrasses the heck out of Char, Joe thinks it is absolutely hilarious! Thor; just as long as you get him back to his pillow, he seems pretty ambivalent about the way that would occur!