“When letter carriers deliver mail in our communities, dogs that are not secured or leashed can become a nemesis and unpredictable and attack,” said Leeann Theriault, USPS employee safety and health awareness manager.

Source: https://k2radio.com/u-s-postal-service-says-more-than-5300-mail-carriers-were-attacked-by-dogs-in-wyoming-last-year/