I have 10 pullets that are about 8 weeks old - Americaunas and Production Reds. I already have 3 big ones in my flock - 1 Aracauna Roo and 1 hen, and a RIR hen. These are all about 1 1/2 years old. These hens lay regulary. My question is when and how should I integrate the younger ones with the older ones?? Also, when and how should I begin to change the pullets feed to what the big ones eat? At present the pullets are in a pen right next to the big ones, so they have already seen each other for the past month. They just haven't actually been in the same pen together. Any and all advice is greatly appreciated. Thanks and God bless.