I had heard about this odd behavior, but most comments dispute the idea of a CROWING hen. Well, I can confirm there are such birds about. One of my 2 year old hens has been crowing. These are most definitely hens, have been laying eggs for a while, but recently decided to begin a funny, sing-song "crow" in the morning. I believe it's one of my barred rocks but can't be sure because they stop when I show up. I also have a broody for the first time and wonder if the two are coincidental or go together. Well, all I can say is the crowing isn't as loud or harsh as a rooster, but more like a "church lady" trying hard to sing at the top of her range and hold a high note unsuccessfully. Very funny sound! Hopefully the neighbors think it's me out practicing my opera, and not an outlaw rooster.