If I am going to create my own sex link breed, not buy from the hatchery I will be able to sex them at birth. But, unlike the hatcheries they won't be prolific layers because they won't have been bred through generations of "great" layers. Is that correct? They also shouldn't "flame out" after a couple years as those from the hatchery will. So I shoulh end up with sexable at birth chickens that grow faster than the standard and are good layers, for a long time. Is that all true?