So two weeks ago I started my flock with 6 Rhode Island Reds, 5 Barred Rocks and one NE Red. A week ago I got five Buffies. All are thriving except one of the NE Reds. She has barely grown at all and even though she is a week older than the Buffies, they are already larger. She seems to be eating and drinking but not growing. At this point she is n't being picked on by the larger chicks but I am concerned. Any suggestions?