I have 9 standard size chicks that are currently 2 weeks old. I also have 6 bantam "chicks" that are 18 weeks old. I have the babies in the brooder at night and during the day I put them outside in the older chickens run... Inside their own chicken wire pen... They are able to see how the other chickens interact and neither groups seem bothered by each other. If anything more interested than I thought. My only concern about letting them mingle (I won't let them until they're at least 10 weeks & can hold their own) is their feed! They older Bantams just finished the grower/finisher and started on the laying crumbles. My babies are still eating their starter feed, but when they are 10 weeks they should be on what my older ones just finished. How do I make sure they get the right nutrients to grow? I want to have them all as laying hens so, would it be terrible to start them on the laying crumbles early? Or can I mix their grower finisher feed and my older hens layer so they both get what they need?