I have never owned a mastiff; never even seen one (except a 4 mo old pup). But I have come to admire their look (minus the slobber!) and the fierce look they can sometimes have. Aslan is my favorite (even tho Mr Pooch will say he's only a mix) with Otis, Mojo and Uallis, a very close second!!!. I would love to become one of Aslan's friends because I would not want to be a stranger walking up on him. 