I started a flock earlier in the spring with 8 one day old RIRs. My neighbor was wanting to add another chicken to her flock and purchased a 2-3 day old black copper marans and had me foster it with my chicks. They are now about 11-12 weeks old and the black copper marans ended up being a roo instead of a pullet. He is mean to my RIRs, not to the point where he is leaving wounds or anything but he has stripped all the big feathers off of one wing on one of them that I am suspecting is also a roo. The neighbor has taken him into her yard to free range with her hens a couple of times as an introduction to her flock and her hens act mean towards him. I'm torn between my pullets getting a break from him and not becoming used to him being 'the man' as well as what will happen if the RIR I suspect is a roo starts feeling his hormones versis the poor little black copper marans roo being bullied by the hens next door. I don't know what to do. I feel bad for my RIR that is being bullied and having feathers plucked but would also feel really bad if the neighbor took her roo home and it ended up getting hurt by her hens. HELP!! What would you do?