A few years ago I posted on hear because one of my hens had never layed an egg to this day she still has not produced an egg !!so while Ihave just excepted this this morning the strangest of things happend .... she has started to make a noise just like a cockeral help what on earth is going on !!!!
She wants to be a boy.
One of ours wants to be a boy
so why does this happen
One of the better explanations here: http://www.urbanchickenpodcast.com/ucp-episode-018/ (http://www.urbanchickenpodcast.com/ucp-episode-018/)
In your case, it sounds as though her oestrogen levels were never very high (or perhaps the overies were malformed), and as she's got older, the testosterone has triumphed!
wonder if they have gay's in the chicken world???....just a thought.lol!!
Homosexual behaviour in animals is common, has been observed in over 1500 species and well documented in around 500. It's estimated that around 25% of mallard duck pairings are male-male (and incidentally, there is even a case of homosexual necrophilia recorded in mallards). It's not just sex either, standard pairing behaviour is present too.
I think this is a different case though, this is a chicken that for whatever reason (presumably hormonal) is showing male characteristics. Interesting stuff!