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 Post subject: green sheen
PostPosted: Mon Jan 31, 2011 6:27 pm 
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Joined: Mon Jan 31, 2011 3:20 pm
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What causes the green sheen on black Australorps? and some pekins? is it the same as the Cayuga Ducks?


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 Post subject: Re: green sheen
PostPosted: Tue Feb 01, 2011 5:57 am 
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Joined: Tue Jul 27, 2010 7:32 am
Posts: 444
Location: NSW
Hi Daning,
From memory and from reading an explanation of this in Carefoot's book of genetics, I will attempt to give you an explanation.
It is created by the pigment size, shape and density in the cells of the feather, different pigments are sized, shaped and contain different levels of pigment, thus giving the colour and sheen to each feather.
The thing with GREEN sheen is it is common requirement of all black varieties.
The common fault with the sheen is at times it appears purple or barred in it's lustre and these 2 faults are to be avoided and are the downfall of the lustrous green sheen required.
In breeding they are to be guarded against at all costs and only breed from birds showing the rich green sheen, once introduced or fixed in a line the purple, barred or dull sheen is very difficult to erradicate.


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 Post subject: Re: green sheen
PostPosted: Tue Feb 01, 2011 5:09 pm 
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Joined: Thu Oct 28, 2010 10:50 am
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Location: Brisbane
Daning,

The green sheen in all black fowls is very much linked to the gentics of the birds. However if you donn't select the correct birds in your breeding pen, you will loose the "beatle green sheen" so highly desired and end up with a flat black or purple sheen and well as completely balck legs, beaks and mulbury colured combs. In Australorps, selecting a male bird with a white coloured beak this will link to the colour on the feet as well as females (hens not pullets) that have a few white tips on the end of their flights. All these will only enhance your chances in obtaining the Green sheen. In Pekins similar except there your are dealing with the yellow pimgent in the legs and skin and there are pullet lines and cockerel lines. The males in your pullet lines will has execss white in undercolour, while the females in the cockerel line will tend to have darker / horn leg and beak colouring. Need to understand what you have there. So basically too much black in the mating and you end up this purple or flat black, if mating balanced you generally get green sheen.
Note stress will cause purple barring, thats another issue.

Rhode Red


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 Post subject: Re: green sheen
PostPosted: Wed Feb 02, 2011 6:46 am 
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TWO FACED
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Joined: Sun Nov 04, 2007 8:15 am
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Well put Oaklands and Rhode Red

# Note that the green sheen is also to be considered in the 'regular' Cuckoo pattern [well in Orpingtons anyway = I only know abt Orps in Cuckoo]
But this must NOT be in the other colours of Cuckoo - Blue, Slate etc as then it is a major fault and the birds are disqualified

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 Post subject: Re: green sheen
PostPosted: Thu Feb 03, 2011 6:16 am 
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Joined: Mon Jan 31, 2011 3:20 pm
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Thank you for the explanation excellent information and it explains eveything


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