When your sights laser in on a pugnacious little bulldog blazing down the street, what is the first thought that crosses your mind? Well, if you are semi truck driver, you will leap and yell ‘Hey! That’s Mack!’ Bull Dog is a trademark of Mack Trucks Inc, an old horse in the trucking world. Mack Trucks Inc is known for building heavy-duty trucks that are capable of enduring a punishing terrain and the vagaries of nature.