Hi, "duluthralphie" I crossed mine with Black Australorp. I started this breeding project for the same reason as you I want a larger thighed and bigger breasted bird, but I also want a healthier bird with less health issues, which I think I've managed to get, here are some pictures.
These are my Cornish Rock Cross Breeder hens, with My Black Australorp rooster...
This is a picture of one of my Cornish Rock cross/black Australorp cross hens... (about 2 months old)
This is a picture of one of my Cornish Rock cross/black Australorp cross roosters... (about 2 months old)
They are sex-link in color-all the hens are splashed and all the roosters are pure white. I call mine "Fatty fatties."
Edited by mom of silkies - 7/5/15 at 6:19am