What's that huge dog with the short, coarse coat and mellow personality? It's the mastiff! Mastiffs are gentle giants with a calm and easygoing temperament. Their owners think they are the best dogs ever-and it's easy to see why. If you're a mastiff fan, you'll want to learn all about this breed, from its therapeutic work in hospitals and nursing homes to its history of fighting with the Roman army. You'll also want to find out how to care for the...