Dogs (obviously) make great pets, and there are few breeds cooler and more loyal than the Neapolitan Mastiff ($TBA). Originally bred as arena dogs in Rome, the mastiff is less aggressive than its heritage would indicate, and is now known for its docile, steady demeanor — although still a very protective breed. These loyal dogs can get really big (upwards of 150 lbs.) and get your buckets and mops ready if you plan on bringing one into your home — they’ll drool on everything in sight.