I have 9 birds two of each Buff Orpingtons Buff Brahmas and New Hampshire all at 18 weeks all pullets. Three Light Brahmas two pullets and a roo, not sure of the age guessing around 6 months. I'll be adding a 25 week old Blue Orpington rooster this week. Question is what is the best way to introduce him to my flock? I know I'll have some feathers flying as the two boys decide who will be the boss but what can I do to make it as smooth as I can? Thanks for all the help.