There is less of a problem when the boys are younger as as they grow older and more mature, they will fight more competing for the girls.Hi everyone.... looking for some help. I have 8 14wk old birds in my grow pen, they were suppose to be pullets. It looks like I have 4 maybe 5 cockerels in there. In my chicken house I have 10 hens and 1 EE roo (23wks). My question is can I put the new cockerels in with the existing flock or should I keep them separated. The batch of eight are 5 production RIR and 3 production BR. I think 1 rock and 3 RIR are cockerels. I am planning on putting the hens in when they are a little bigger, but not sure what to do about the boys. If I let the boy free range and only put them in at night, would that be ok?