Because I did not pay attention at TSC I got 3 red pullets and 3 straight run RIR. The RIR are about 2 weeks old now. And 2 of the 3 are bigger than the 1. And those two a couple times a day will stretch up tall and jump and bang their chests against each other a couple of times before they scatter in different directions. Or is this normal for all RIR at this age? TIA.