I love breeding my own birds. My avatar EE roo throws some very nice chicks. I got a nice group of black sex linked green egg layers last year (EE x Dominique). Plan is to get some Dom chicks next spring to carry forward with the BSL chicks. My base flock is bred from Rose comb brown leg horn, Dominique, EE, Pioneer. This spring, I added some chicks from shipped eggs. IMO, home bred chicks over time will result in a flock of birds that are specifically adapted to your environment. By setting the best eggs from your best hens, over time, you will end up with better hens and better eggs. Also, in order to improve your flock, it's important to have a cull program in place. Remove the birds that are not performing well or that don't meet your flock criteria.