Of course it’s nature, not a choice. Perhaps “choice” was a poor word to use but my meaning was there.
My bird was a late bloomer. OPs hen has had something gone awry with her hormones.
Very cool! I’ve read about this and ALMOST thought my rooster Roopecca started as female. That’s why I asked those questions. Mine was young. His brother Marvin had matured a good 2 months earlier. We had no sign that Repecca wasn’t a pullet. Smaller than the other pullets, seriously smaller...
How long was this chicken actively an egg layer? How old is this bird? How many other hens do you have? How old are they? Is it not possible one of them has been laying the eggs since they usually all lay in the same nest?