The formula for creating an autosexing bantam breed?

[1muttsfan]

Here is a helpful thread for Barred Rocks. Speckled Hen's post is informative, she has been breeding BR's for a long time.
https://www.backyardchickens.com/threads/how-early-can-you-accurately-sex-barred-rock-chicks.397799/

 

[Mellowmalt]

So if anyone is interested these are my 4 current cuckoo dutch bantams and I could tell from when they were born which was which but now that they are 2 weeks old it is quite obvious. You can see from the combs that are already developing so I'm sure you will all be able to spot the female.

 

[Mellowmalt]

Size once fully grown. The grey/white one is my fist male

 

[1muttsfan]

Nice looking dog