I breed to the SOP but before covid, I was showing my birds. This is what I use for the breeds recognized by the APA. There are several threads on BYC that have a lot of very good information. I have done experimental breeding's in the past but now I just work with my pure heritage breeds. Good luck and have fun...
https://poultry.extension.org/articles/poultry-anatomy/poultry-genetics-an-introduction/
This is one of my female RIR's on champion row waiting to get her picture taken.
Some of my males. The cockerel in the middle was also a champion.
https://poultry.extension.org/articles/poultry-anatomy/poultry-genetics-an-introduction/
This is one of my female RIR's on champion row waiting to get her picture taken.
Some of my males. The cockerel in the middle was also a champion.