I read this thread with interest because this is exactly what I am planning to do -- introduce breeder-quality birds to my hatchery flock to get them going back toward the breed standard as proper dual-purpose chickens. I have 18 Delawares. My question is this: If I acquire top birds from a breeder, why not just let them make a flock instead of breeding them into my hatchery stock? Is there any benefit to me/the flock by breeding the hatchery hen to the top rooster and the top hen to the hatchery rooster, etc, etc down the line? If I keep my hatchery birds separate, I could collect what eggs they give and let natural attrition deplete the flock while I build up the breeder flock, yes?