I agree. I was going to mention that out of the hundreds of breeds available, there are dozens that already fit that description.
http://www.albc-usa.org/documents/chickenbreedcomparison.pdf
http://www.sagehenfarmlodi.com/chooks/chooks.html
http://www.feathersite.com/Poultry/BRKChickensA-C.html...
What is your goal? IMHO you have lots of genetic variables that may take a very long time to arrive at something that is sustainable and repeatable. Especially starting with 3 birds. It takes lots of birds, lots of hatching, lots of culling over many years to achieve what one would call a 'new...