I have 15 RIR pullets recently theres been 2 hens that are constantly after my fiancee everywhere she goes in the coop and in the run they are always right after her. The other day she got bit and she gave it a kick the hen was right there again almost like a cockerel. So i started going in and the hen does the samething Im new to raising chickens we got them in early may as chicks. Any advice what to do? If the aggression continues should i cull it? If it is a cockerel at what age would it begin crowing? Another Question when should my chickens start laying?