I have one standard partridge in my flock that I got from McM. They are exactly 5 months old and several of the others have already started to lay-americaunas,barred rocks,ect. I got her after seeing the huge beautiful cochins at the Biltmore Estate here in Asheville- they get all of their chickens from McM. She is the same size as the others-when do standards get to be full size? I really want one huge fluffy butt hen. thanks for any info...