I have 1 coop which right now holds 4 RIR hens, 4 Delaware pullets, and 2 Delaware cockerels. I know I will be getting rid of one of the cockerels. My daughter is in 4-H and we just started in entrepreneurship. She plans on selling eggs and chicks from our eggs. We got the 2 cockerels and 2 of the pullets from the same person. That person got them from a friend who hatched the chicks, so it is possible that they could be sister/brother. Is it okay to breed chickens that close in relation, or should I get rid of both cockerels? I'm really new to all of this chicken stuff, so your help is greatly appreciated.