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Here you go! https://www.backyardchickens.com/threads/hatch-a-long-two-colours-in-each-eye-what-will-her-babies-be.1501665/page-5#post-25128353

I'm following it, let me see if I can link it for you.

After you calculate the cost, and the amount of space you can offer per bird, (I like to offer at least 20ft of space per bird in the run, 5-10 in the coop) than the science experiment is the way to go. Theres a thread on here experimenting with refrigerated eggs producing more females.