All charts are based off the SOP- -yet when MOST, especially ALL BIG TIME hatcheries make breeding decisions, it sure isn't based from the SOP.I was reading this chart
http://www.ithaca.edu/staff/jhenderson/chooks/chooks.html
To determine the breeds I was interested in. Anyone have any major disagreements about their list of dual-purpose?
So therefore, this chart, and any chart- is as only as accurate as where you bought the birds from.