Have a letter anxious to be sent, but found that most of your favorite owls in the Hogwarts Owlery have been used to deliver other former student letters? Don't be so impatient to come down to the Hogsmeade Village and head into the Post Office to deliver that soon-to-be-delivered letter, ready to be read. Just.. make sure those twittering owls don't cause feathers to land on your head.