My youngin's are 10 weeks now and have been in a fenced off area in the yard with the big girls for weeks. Every now an then a big girl gets into their pen in order to eat their crumble starter and every now and then a youngin' gets out. We have enough room in the back yard for everyone so I really think they can be put together, but I'm worried about the laying ladies only eating the grower food and the little ones getting into the layer feed. Isn't that bad both ways? What does everyone else do?