That makes more sense that autosomal factors in addition to sex-linked factors are more at play with the down color. If they were sex-linked factors only, the boys down color would be coming from mom only?It doesn't really LOL. But we do know there are two different barring genes in our breed and they may play a part in the down colors as well as the adult barring we see later on. So if one parent had the light barring and the other the dark, the chicks could all be different depending on which genes they received. Add in a bit of Autosomal red and some could be cinnamon as well!
Add close breeding and even proper line breeding to the mix and recessive traits that may have been hidden begin to pop out. Sometimes they are desireable, sometimes not so much. For example, my first and second generation of pullets grew in with "mottling" that their mothers did not have. While I thought it was something to be avoided, it ended up being the beginning of proper barring that was lacking in my first hen! Now to the negative, some of this past year's birds had too much melanin, resulting in black tipped breast feathers ( another trait they did not share with their parents). As we all work to hide or eliminate the traits we don't want, and bring forward the traits we do...there will be a multitude of things that pop up, and trial and error through test breeding will help shape our way. HTH![]()