Colour change after moult?

Beaky10

Hatching
Jul 4, 2019
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3
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One of my hens hatched this Wheaton pekin around 5 years ago (the eggs were from an auction so unknown parentage, genetics etc.). She's always had cream/buff feathers which remained the same after each moult, but this year her new feathers are in a range of colours, are much softer and shiny, and her tail feathers are now longer and more similar to a cockerals (see photo).

She lives with a Transylvanian naked neck hen of around the same age, and on and off I have heard some crowing in the mornings (although haven't manage to determine who it is). I've had a hen before who began showing cockerel like behaviours in her old age so was wondering if my pekin could potentially be changing to a cockeral? And if so, could this be used to explain her colour change? However she has no spurs or any change to her behaviour and comb/wattles. I've heard of feather changes due to receiving a balanced diet after a period of malnutrition, but she has always had a good and consistent diet.

Anyone have any ideas or experience of this? She seems happy and in good health so I've got no worries health wise, just curious as to why this could be happening.
 

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Agree with the wow! She really does look like she is turning into a roo. Wheaten hens are buff with darker brownish neck feathers but wheaten roosters are red all over with black in the tail.
I assume she is no longer laying? It's very likely she has a problem with her ovary. I believe I've read somewhere that hens only use one ovary and if it shuts down hens can begin to exhibit male characteristics. It is called spontaneous sex reversal.
The hen may end up a 'rooster' in all respects except she will probably not be able to produce sperm to fertilise eggs (although apparently it is possible in extremely rare cases)
 
Thanks for your help, she hasn't laid any eggs this season so it certainly does look like she could be changing to a cockerel! Behaviorally she's still quite timid and defiantly not showing any protective/assertive cockerel behaviors - I wonder if this might change as time goes on? It's not the best photo, but here's what she looked like last October before she moulted.
 

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