I'm also looking for ya'lls information and try to share some let's see what happens lol! My dark Cornish are also from Murray McMurray as is my broiler girl. Spring I will be getting some more Cornish X, Delaware to grow out. I have 1 mature Cornish X hen Boobette lol and 2 mature dark Cornish...
Me too here in Louisiana it's very hot and humid so these girls grew during the hottest part of the year and from the 4th week were out free ranging "supervised" and limited food was really excited that they beat the odds and gave us eggs :)
We keep her away from our big feeders and don't let her get to much attention from the roosters she isn't a real quick runner lol. I had 2 giving me eggs but her sister began to show symptoms of heart failure.
Please do up date as I too have cornish female that I thought would make a good cross with the dark Cornish or my barred rock also was going to put a Delaware from MMC stock to see my "meat birds" project to provide a great bird that dresses out with a bigger breast.Thanks
.p