The U.S. Postal Service in late January issued the Dogs at Work set of stamps celebrating working dogs. The set features one stamp each depicting a guide dog, assistance dog, detection dog, and search-and-rescue dog.
"We are proud to commemorate these specialized dogs on stamps," said Michael T. Butler, U.S. Postal Inspection Service homeland security director. "These animals are critical to serving individuals with special needs and critical to enabling successful rescues."
The 65-cent stamps are good for mailing first-class mail weighing up to 2 ounces and square greeting cards.