Im going to play devil's advocate and say they probably just looked for a picture that looked like what she did look like. Most people don't take pictures of their run of the mill chickens, its only in hindsight they found a need for pictures.
But hens turning into the rooster phenotype isn't...
The leg colour change makes sense if she went from laying to a non-laying pseodo-rooster. When a chicken lays the yellow pigment is drawn out of the skin, starting with the cloaca and ending at the beak, so good laying hens turn from yellow to white.
I have a hen that turns semi-rooster every...