Somewhere someone said they bred CX to CX and got a wide variety of sizes. The best didn't live as long as they would have liked and didn't pursue it further. The male CX get too big to breed quickly.So I've just seen it in dozens of threads nobody knows how to make a CX. I think the question has become generalized from years of hearing the same question over and over which you guys have lots of patience for and we appreciate that.
The question is really 2 questions
1. How do you make CX ( nobody knows the answer ).
2. Is it a sustainable breed.
Lots of people ask are they a sustainable breed but everyone says no. I just think that's wrong.
Tyson imported a single type of bird and it is still the same bird today. They have been using the cobb 500. When this bird was bred in England yes they likely used several breeds for generations but today the cx is the same bird. Tyson didn't import 7 different flocks. They imported 1800 eggs of 1 bird and today we have the great great great grand babies. They must be using CX as breeding pairs. Not to mention hatcheries. Now the bird certainly has some mortality issues and if u check any of the links in my posts they approach in a purely scientific manner. They measure feed by Gram per kilo body weight..... not "about this much" like most of us weigh our feed. And feed, lighting, genetics, temperature is completely controlled from hatching. Most of us are hobbyists.
Hard to breed yes. 1 male and 9 female gold comets would make 2200 chickens a year (ish). Even I could get those results.
Would need at least triple the CX for same results. And that doesn't include culling imperfections.
Some one got a CX to live a year and was laying eggs. Though compared to me they are god level at chickening.