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This is a really fun calculator. Don't know if you have tried it or not but all you do is select your bird's color types in the drop down box and then click on " go to chicken calculator" on the right and it will provide you with the theoretical percentage of different offspring and their genotypes that will result from the cross. Then you can take each of the offspring with their different genotypes and calculate crosses with them.
It works well to calculate theoretical percentages of offspring from Black Coppers that carry recessive genes for Wheaten.
http://kippenjungle.nl/Overzicht.htm#kipcalculator
I have had Bev Davis black coppers for over 3 years, and never hatched a wheaten. I am 100% confidant that if your birds are only her line, will not get any Wheatens.
The Wheatens that pop up are from the Jeane line. Its getting pretty common for wheatens to hatch from that line, so you know that somewhere, a wheaten was in the mix.
I bought mine directly from Bev. If you are getting eggs or birds second hand,then you don't know what was mixed in.
Sue
Ahaha, you know I have to make a comment here-it is really kind of futile to spend the time defending the purity of this line or that. Because the bottom line is, once you sell eggs from your stock, or release or sell any animal from your breeding program,
you relinquish your control. And I think in general breeders are fairly controling and opinionated people; and of course I say this as someone who has bred animals for years, so I'm not criticizing others by saying it, it is simply an observation I've made about most of us.
But anyway, when you release your stock to others, you relinquish control of your breeding standards; your ideas, your opinions about how the stock from your line should be handled. I'm very glad that there are breeders who are willing to do this so we can all enjoy the breed. But it is an inevitability, a certainty that you will have absolutely no control over what others do with stock from your line. And the only way to avoid this if you find it to be annoying, offensive or unfair, is to not release or sell any of your stock.