Breeding is something you can devote your life to if you want. I am on my fifth generation of Narragansetts and they are now 3" taller, with longer shanks and keels, and 4 pounds heavier at 7 months than the first generation, while maintaining balance, vigor, and conformation. To get there, I've had to cross in bigger Bourbon Red (resulting in Golden Narragansett) and I can get back to Narragansett in one generation.
The easy part is generating a lot of offspring for the next generation of breeders. The hard part is growing them all out until they are big enough to evaluate and ruthlessly selecting the top 10% to keep and grow out to maturity. Because I have favorites in the flock, I had to create a scorecard to objectively evaluate my stock against my goals, and then I had to sell some of my favorite adult birds because once the next generation was on the ground, they were no longer in the top 10%. I did this 3 years in a row. This is the first year I am keeping both a male and two females from the previous year because they were proven breeder quality that met the standards. I want to close my flock this year, I should have good enough stock to build from for several generations. Every importation of new stock brings its own issues that don't always present until the next generation.
The easy part is generating a lot of offspring for the next generation of breeders. The hard part is growing them all out until they are big enough to evaluate and ruthlessly selecting the top 10% to keep and grow out to maturity. Because I have favorites in the flock, I had to create a scorecard to objectively evaluate my stock against my goals, and then I had to sell some of my favorite adult birds because once the next generation was on the ground, they were no longer in the top 10%. I did this 3 years in a row. This is the first year I am keeping both a male and two females from the previous year because they were proven breeder quality that met the standards. I want to close my flock this year, I should have good enough stock to build from for several generations. Every importation of new stock brings its own issues that don't always present until the next generation.