We have 17 hens, RIR and red stars, with 5 buff orpinton and 5 barred rocks on the way, We are contemeplating trading friends a hen for a rooster. We are concerned about putting the rooster in with the existing flock and unfertile egg production. We don't want to have to keep seperate flocks if we don't have too but have no idea as to how many hens and how often the roo would mate with. Any tips, pointers or suggestions are gladly welcome.