Duck - hormone problem?

[Muddy unicorn]

One of our khaki Campbells hasn't started laying again this spring - she laid happily and regularly last summer - and I’ve just noticed that she’s developed a ‘drake’s tail’ curly feather. Obviously she’s not changing sex but does anyone have any ideas as to what might be causing this? The other five girls are all behaving completely normally, as are the two drakes. Our small animal vets don’t ‘do’ ducks and the farm vets don’t ‘do’ pets - I’ll take her there if I need to but I’d rather not stress her out if possible.

 

[Gloi]

It's caused by a problem in the ovary, description here.

Sex-Change Chicken: Gertie the Hen Becomes Bertie the Cockerel

Under the right circumstances, a hen can actually transform herself into a cock.

www.livescience.com

When Hens Become Roosters: A Fascinating Phenomenon

Having spent countless hours observing our flocks over the past 12 years, I've witnessed some remarkable behavioural changes in our hens, albeit on very rare occasions. One of the most fascinating phenomena I've encountered is when a hen in an all-female flock begins taking on distinctly...

talkinghens.com.au

 

[kate_grey]

Thank you for the info