While depictions of dogs attacking letter carriers have long been a staple of cartoons, it’s no laughing matter for the carriers, with nearly 5,800 postal employees having been attacked in 2014. If a letter carrier feels threatened by a vicious dog or if a dog is running loose, the owner may be asked to pick up the mail at the post office until the carrier is assured the pet has been restrained, USPS said—and if the dog is roaming the neighborhood, the pet owner’s neighbors may be asked to pick up their mail there, as well. Cities where the attacks happen most frequently are Los Angeles, Houston, San Diego, Chicago, Dallas and Denver.