Ugly duckling (or chicken)

Two years ago, we bought 5 chickens from a place outside of D'Hanis, Texas.  One chicken was a scrawny little chicken, that looked like a small rooster.  I knew she wasn't a rooster because she laid eggs.  I named her Bobbi Sue.  She was one of the hens that we bought up north with us.  Recently, I went out to add feed to the feeder and clean up their coop.  I was shocked when I saw what I thought was a new chicken.  My ugly duckling had turned into a swan.  She had finally matured.  I was convinced that someone had exchanged her, lol.  The chickens are doing well, adjusting to the cold temperatures.