i free range as much as possible, so everyone pretty much gets chick starter/grower and i offer free choice oyster shell. if they're in a breeding pen, then i use layer pellets since there's less waste involved, plus oyster shell offered. i will say tho, my free range eggs are much harder than my breeding pen ones... go figure. now if they made a starter/grower PELLET, i'd be all set.I'm sorry,I can't contribute to the genetics discussion.
But on a couple of other threads I follow, people are talking about customizing feeding regimes for specific breeds, or different phases of the chickens' life cycle. Have any of you found a custom supplement or mix that seemed to make a significant improvement in the growth/condition/hatchability of your Dorkings?