If you sell offspring, just say they're barnyard mixes that *might* lay colored eggs. I wouldn't bother getting into probabilities.Thanks for the info. I tried looking it up but couldn't find anything specific about interbreeding that I could understand. Good to know for future reference.. my girls are only 5 months old so we have a ways to go before anyone starts getting ideas about being broody, but it's good to know for any aspirations of breeding & possibly selling chicks.