I have been studying this in detail, and have even gotten into some patents on these CX birds. The largest problem is that even if you have the linage and the process it is so deep. Like for an example you breed a complex, muti linage base stock, and then have a completely different hen and rooster. Then their grand parents, and great grand parents can be bread to us as CX parents. There is a separate linage for the final hen you use, and a completely separate linage for the rooster. Even with the right info it takes years to come up with the parent stock to produce the CX offspring. All patents are public information, and the information is there. The problems are the time it would take to set all this up, and the fact that it is illegal to use, make, or possess any thing that is protected by patents. So far be it from me to suggest that anyone violate any of these rules. Still beyond that I have found the patents are in various names, then probably assigned to company's with contracts, that are not public knowledge, so another veil over the process. There is no way to cross reference these names, except for getting into a database of the patents a breeder holds, and to then look up the patents by their numbers. All in all if you wanted to try to breed the CX yourself, with about 2 years of patent research, and another 8 years of breeding you might pull off producing an illegal bird, that is with luck. From all of my research a a cross of a male large breasted Cornish strain and a female of a tall, large-boned strain of white Plymouth Rocks is an easy everyday meat chicken. These were used extensively before the newer hybrids were developed, a poor mans CX, or should I say above average meat chicken. It wont be as fast growing as the CX, but it wont have the health problems, and you can produce it yourself. This hybrid is the base the CX is built on from all of my research. So I am going to give the cornish rooster, and a plymouth rock hen cross a try and see how it works.