I have a trio of bantam chickens that I want to ad to. My problem is the older chickens are laying and the new ones are only about 8 weeks old and of course still on feeder/grower. Can I mix these together and how do you feed them so that everyone is getting what they need. I know I can't feed layer to the babies, but the bigger ones need that. Any help would be greatly appreciated. I would like to get them out of my kitchen!