These are the new 37¢ stamps issued by the Postal Service to help raise awareness of the 10-13 million innocent pets euthanized each year -- each one killed because someone did not spay or neuter their own pet, creating litters of puppies or kittens that take the homes of pets in need.

You can purchase the stamps at your local post office or through the United States Postal Service online (the link will open in a new window).