Coturnix coturnix Breeding Progress

When selecting for multiple characters in a single breed, progress is slower the more characters that are selected for simultaneously and vice versa. I have four breeds of Coturnx coturnix for which color is one of the selection parameters. I have therefor decided to have a breed of birds where color does not matter and I am selecting for functional efficiency only. It is remarkable and exiting that in only two years, with relatively small numbers of birds, this new breed (call them BYF Specials) are slowly, but definitely, outperforming the other four breeds. At present most of the birds are dark brown with patches of white. Interesting times ahead!