Worked for the Post Office for 25 years myself before I got out (retired). Delivering the mail really is, or can be, fun. I LOVED my route when I had one that was worth having. Then I hurt my back, then management came along and screwed it all up, etc etc. Did my years in management too. It's...
One of mine sometimes screams like a banshee for no apparent reason. But they do have a distinctive "THERES A ****** HAWK HERE AGAIN" call that I know.
I tell mine that they are dual purpose birds. (Orpingtons - they do lay later than the sex links) That means if they don't lay I get a chicken dinner. It eventually works if I say it long enough. One held out for 10 months but finally it did work. :gig