I have two question. I have a rooster who is 1 year old now and I have a batch of babies. I have one chick about 4 1/2 weeks old. Baby chick has been around rooster and he sees baby but has never gone after baby. I don't know if baby is boy or girl. Can roosters and hens tell the sex of the young? The hens see baby and are letting baby know baby is low bird on totem pole, but rooster calls baby over and shows baby food like he does hens. 2nd question, when can you put juveniles with established flock?