Thanks for all the good answers. A little more detail might help.
I'm using a college student intern who is a biology major to raise American Bresse chickens in a manner similar to the traditional French method. We need to develop a protocol for choosing breeders to retain from the flock...
I'm not interested in raising hybrids.
I should have been more detailed in my explanation. This will not be a zero-input operation. Birds will have access to milled feed but will be on pasture during the day. It's really day-ranging and not unlimited free-ranging.
Assume that you've chosen a particular breed of meat bird (not a hybrid) and over time want to develop an improved strain of the breed specifically for free-range meat production. In other words, you want to apply some scientific rigor to selecting breeding stock over many generations. Which...