Oh -- have to say too -- I know the 'recipe' for Cream Legbar autosexing -- and so I definitely have that perspecive/bias -- LOL - like that old saying 'if the only tool you know how to use is a hammer -- you will treat every problem like a nail'
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From what I know -- the autosexing breeds are breeds that R.C.Punnett developed in the 1930's. Some say that Barred Plymouth Rocks are sexable at hatch (hence would be autosexing) -- but I saw a thread on that here on BYC -- and I wasn't 1005 certain how easily I personally could ever 100% guarantee sex of chick based on the photos...I might as well use him over RIR hens because I already have them. Im sure the first cross is always going to be a mismatch of colours and sizes but if I cross him back over I should have an autosexing chicken.
Wow a lot of info! I think the two chicks he has already produced are both pullets, but they both have the white dots on their heads... or maybe if I cross him with RIRs the females will have the white dot?
I'll be using hens that arent good enough to be bred in my RIR breeding pen that way I have a use for them. Plus it'll be a first trial to see how he goes, the hens are huge 3-4 times his size so he'll have to work hard to get it done.
I think it'll take a few generations to be able to say something is 100% autosexing.
Is there any autosexing breeds that are a pure original breed? Or are they all mixes of others to create the gene?